The bottom is guarded due to past relationship/s. So yeah he would act that way.
Being guarded does not keep you from being self aware about how your actions affect your partner. Just because you have been hurt before, does not mean you are incapable of hurting another person with mindless actions. He literally chooses sex over communication, and that’s why the top frustratingly keeps getting hurt. It’s so invalidating that the INEXPERIENCED and YOUNGER top in his FIRST relationship has to be mindful of the bottom’s past relationship issues, but the older one who knows about the grievances of being unclear with a lover and the repercussions that come from it keeps putting himself in situations that further instigate misunderstandings.
Protecting oneself from getting hurt can definitely make someone blind and only think about their own pain. It's a process opening one's perspective again and be mindful of the other party. That's why the bottom realized later on that his actions were becoming similar to his ex boyfriend and berated himself for it, all because he kept himself from fully committing the relationship.
The bottom gets on my nerves. He needs so much character development, I’d hate to have a partner like him