Actually I feel like he is the only one who does consider the MC's feelings. He holds back information to others. I feel like if he knew who he was at first then he would have tried everything to protect that information. You can see where he does this multiple times to protect the MC. But the MC had to actually out himself, and at that point he couldn't do anything.
It was more like the ML wanted to be the only one who knew who the MC really was. Yeah he teased him a lot, but thay pretty much it.
Wow now this is a hot take! Personally I don’t believe he’s inconsiderate but perhaps more boisterous and outgoing and it appears as rude and disrespectful. I believe what he’s trying to do is ease MC out of his comfort zone, MC has remained stagnant and alone with no one to relate to nor seek help from and I believe ML is attempting to be that someone who MC can rely on him for, especially considering they’re both of the same caliber and rank. It also might be selfish on part of ML bc he hasn’t met anyone who can match him in terms of strength and you have the infamous MC who knows all the suffering that comes with being an S rank. ML is also more smart than we give him credit for especially when it comes to observing MC’s habits and tendencies that are harmful to himself.

Byeeeee I don’t like the ML.‘I feel like he’s so inconsiderate towards MC’s feeling and his suffering he had to endure.