International cricket is not about hitting a few sixes and leaving. Haider has demonstrated no game awareness so far in the opportunities he has been provided, and his attitude resembles that of a slogger. If he doesn't watch out and start giving himself time to get his bearings, he will end up as the next Umar Akmal or Ahmed Shehzad, extremely talented yet no game awareness. Thankfully he does not have a poor off-field attitude, but his match awareness should be better.
You cannot hit every delivery out of the park at the age of 19 or 20, you must give yourself time to develop your game. He is too attacking for his own good, and throws away his wicket trying to be a superstar. What he needs to learn is that if he plays one or two innings at 120-130 SR but hits about 50-60 runs, it will only do him good in the long run.
Take Babar for example, he wasn't extremely talented but he worked hard. His SR was very low to begin with, but it has improved considerably over the last two or three years. It will get even better, but the idea is that he gave himself time to determine his game, and now he's taking it to a higher level.
Until you let yourself adapt to international cricket by determining what role you are comfortable playing, you won't be a good international player. I don't care if Haider needs a few knocks at 120 SR or below, he needs to get runs and gain some confidence. The best way to get in form is to spend time at the crease and get your bearings, which he isn't doing.
Haider is nowhere as talented as Ahmed Shehzad and Umar Akmal were, those guys had the ceiling to reach for. However, he has time on his side, and if he can acknowledge that there are other people to do the hitting down the order, it will do him some good. He should be sent to the NHPC immediately to work on his batting technique, and how he rotates strike. Yousuf will surely know where the problem lies.
If PCB have identified him for the future, they need to understand that he needs some time outside the team. Failing at the international level repeatedly will crush him as a player. What he needs is to go to the NHPC and work on how he bats. He has to change his approach at batting, because right now, he won't be getting anywhere with this mindset.