It's just stupid :D
this is a super competitive game and if you're not tryharding you're not doing it right!
when ever someone calls me tryhard as an insult, I take it as a compliment and thank them in return because hell yeah I'm tryharding I wanna win, it's not like : you know what? I'd rather not try to win and just let that guy kill me in lane... NO I'M TRYING HARD TO WIN AND THAT'S A GOOD THING
and if you think you can hurt my feeling by calling me tryhard... bro your just increasing my ego :D