Seriously, you are having a too low bar for ATG series to be honest.
NZ - He had score of 14,57 in one test 153 , 95 in second test. That's one great test and hardly an ATG series by any stretch.
SA - 24, 73, 50, 29, 110, 4, 76, 20 that's entire series. You call it ATG series, nah. Good series for sure.
Both were just good series at best with one good test in entire series. Not a consistent heavy scoring in series.
A few ATG series after 2010 looks like,
Kohli in Aus - 692 runs with 4 tons
Cook in Aus - 760 runs with 3 tons
Smith in Ind - 499 runs with 3 tons
Kohli in Eng - 593 runs with 2 tons
Warner in SA - 553 runs with 3 tons
Cook in India - 562 runs with 3 tons
Dravid in Eng - 462 runs with 3 tons
Pujara in Aus - 562 runs with 3 tons
Mitchel in Eng - 538 runs with 3 tons
Smith in NZ - 774 runs with 3 tons
Root does not have single this kind of series where he scored big runs consistently and that's the reason for having only 6 away tons in Aus/Ind/SA/NZ despite playing 40-50 tests. Just from my memory I did not recall single great series in these venues from Root, but I listed here after looking at stats. For this reaosn, I don't think just huffing and puffing to score one test ton in Aus will make him great. Him having a ATG series in Aus will certianly make him great.
That's the main black mark because all ATG batsmen have few ATG series in den of top opponents.
Now listing above does not mean that all listed players are ATG. Some ordinary players have great match, but each great players have many great matches. Some good players have a great series but ATG players have many great series in den of top opponenets. Root has none so far.
I mean, what do you really want him to? his last 3 tests in NZ read as follows
226,14, 57, 153*, 95, that's very impressive if you ask me, he can't really change the fact he gets two match serieses.
now regarding this
SA - 24, 73, 50, 29, 110, 4, 76, 20 that's entire series.
he missed out on the capetown runfest where 1300 runs were made with 13 wickets and, other than that he performed in every test and led us to victory at Wanderers which sealed the series for all intents and purposes.
I think this is the problem tbf, You rate serieses as ATG on the basis of pure output, like Virat's Australia series? the series where the Run per wicket was like 44+? that's not an ATG series, maybe if India won but that's just cashing in on flat wickets.
Kohli's actual best series is The South Africa series of 2017-18 where he made like 286 runs in 6 innings, why? because it's not just cashing in on flat wickets and leading your team to no victories, South Africa prepared proper 1910s style wickets and he repeatedy performed on them, that's greatness, making 4 hundreds on pitches that made the opposition's top bowler retire? eh, not so much.
as you always say, Quality of runs > Volume of runs, England just got rolled by Pakistan on turners, back in 2021 if Root didn't score heavily on turners in Lanka we'd have gotten rolled there as well, that's why I rate that series rather than just "well It's not top 4 teams."
anyway I don't really think there is any batsmen in modern era bar Hutton/Viv/Lara who can have an ATG series in India these days, though Root's individual performances there are kind of enough considering he has bowling load in India as well.
his Australia record is a black mark, but if he performs next year in Australia, I don't want any moaning about it just being 2 ATG serieses considering all greats have just 1 or 2, Dravid has 2 (Eng ones), Lara has 2 (SL and Eng 1995), Kohli has 2 (SA and Eng 2018), Smith has 2 (Ashes 2019 and BGT 2017 but his are actually astoinishing), Root has 1 (SA 2016) and so forth, only people like Viv and Sachin and Hutton may have 3.
Rank turners/Green top are not dangerous only when you have great pacers or spinners. Often ordinary bowlers are able to bowl fantastic spells in green top/ rank turners. We have seen that many times in Eng, SA and India.
Now if it's slow turner or pitch with some assitance but not too much, then you need skills to be effective. If pitch has too much assistance then it's bridge the gap between less skilled and more skilled bowlers.
True, most teams come with 3-4 seamers and 1 spinner with the exception of India who have gone ahead with 3 spinners at times, wonder what's harder, a greentop or a turner then.
Tell me one ATG batsman who doesn’t have a test ton in Australia?
I can probably name a bunch of ATG bowlers with no 5fers in X country, another example would be Sobers having no hundred in New Zealand and Dravid only having 2 in SA/Aus after 60-70 innings.
True test of a great batter is his ability to perform in overseas conditions. If Joe Root scored 500 runs in an series in India or Australia - then u can say something. This is why Kohli scoring 593 in England in 2018 is much more creditable
Scoring runs at home never has that same value as scoring runs in overseas conditions. Bcoz u grow up playing in such conditions. Scoring in overseas conditions is much more challenging as u are not used to such conditions. There is a reason we have the tag of " home track bullies" for such players who score heavily at home but not overseas
Root averages 45 in India and Kohli 33 in England, Root has match winning performances in India during their 15 year streak while Kohli has nothing in England to say he won tests, just one great series, not really impressive.
Root is much better in India than Kohli in England.
I was talking about tests only in away conditions.
Kohli, Root and Williamson are even far behind even Cook (he was an opener).
Good bats but not the very best
Make the ball seam a bit with a good zip and watch Cook get turned into a tail ender, he was a good player but it says something when his own countrymen don't rate him and he has to rely on others to be rated high.