I think it is super obvious that Tae is neurodivergent, how he's neurodivergent (such as what disorder or LD he could possibly have), I have no clue. But it's been my experience as someone who is neurodivergent, and the experience of others I know, that people see us as stupid, or just not able to function in any capacity. I've seen the BT5 members treat Tae this way in their content for years, and while Tae is not my fave person, nor do I think he's someone I could tolerate being around for very long, I hate how they treat him. I also enjoyed it years ago when the members would gush about NJ's IQ and YG would pipe up with "Well I think Tae is a genius". He was so salty, lol.
I wouldn't even be surprised if Tae has a high IQ. He seems to notice things no one else does. A good example is that time they tried to prank them on the train and he told them he knew what they were doing because he saw YG's reflection in the window and he was laughing, and he said cause NJ can't speak English genuinely, like he sounded fake. To me, in my opinion, that's brilliant, and they STILL do not respect his intelligence. I'll bet if Tae built a rocket and sent it to the moon they still wouldn't respect him.