Stats aren't everything I agree, that's why I personally rate Root much higher than what his average suggests. He had to shoulder the burden of a weak test batting line up for 10 years, and was forced to bat at an undesirable position to prevent collapses. Imagine being the best batsman having to worry about the team getting bundled under 200 every single innings. This has been Root's entire career.
Root also had to captain a very weak English team for 5 years (half his career), which had an explicitly large impact on his batting (by his own admission too). Even then, Root didn't resign because ECB wanted his service as a captain, but he still turned up with clutch performances time and time again.
Top 5 highest batting average for respective countries in last 5 years, aside from Fab 4 (min 1000 runs)
Australia
Labuschagne - 53.40 (27 tests)
Khawaja - 47.21 (27 tests)
Warner - 45.76 (31 tests)
Head - 40.61 (27 tests)
Paine - 31.97 (31 tests)
India
Rohit - 54.2 (24 tests)
Jadeja - 46.00 (30 tests)
Pant - 43.32 (31 tests)
Agarwal - 41.33 (21 tests)
Pujara - 36.96 (48 tests)
New Zealand
CD Grandhomme - 42.27 (23 tests)
Latham - 42.26 (36 tests)
Nicholls - 41.58 (34 tests)
Taylor - 37.56 (31 tests)
Watling - 36.26 (23 tests)
England (!)
Stokes - 37.53 (51 tests)
Bairstow - 34.65 (49 tests)
Buttler - 32.16 (39 tests)
Burns - 30.32 (32 tests)
Pope - 29.75 (27 tests)
Meanwhile, the Fab 4
Smith - 56.42
Williamson - 56.30
Kohli - 49.68
Root - 49.27
Kinda puts things into perspective, doesn't it? I can't imagine anybody else batting as well as Root did with such a weak batting for a long time, while also being the captain.
Link for the interested
https://stats.espncricinfo.com/ci/e...2;team=5;team=6;template=results;type=batting