Rather than the Mc i think someone whose pushing themselves onto other's comfort zone is annoying even tho they are as cute as a button.
Mc is reclusive and tends to be like alone, a true introvert, I won't say he is annoying, his reaction is true to his setting.
Tbh i have a borderline love hate relationship with all of the characters... They are flawed as much as they are a good person, it's good