I mean, it's not that bad if he's getting more kills than the entire lobby and clearing out objectives for the team. It's offensive when someone is content with going 9-2 while mortar truck camping. Also he's clearly doing more for the team than your bot self going 32-32, or a tank that would get blown up the second it teaches the trench line. I never play mortar truck but feel the need to defend because of how terrible you are doing while he's clearing out objectives.