I totally hear you. It's competitive and people can get salty, so there is bound to be some trash talking and hackusations. It's a compliment in disguise -- it's saying that you play so well that they only dream of being as good as you.
Still, hearing the same song over and over about you hacking can get boring and annoying, especially when you yourself despise hackers.
The thing is, deep down they know you are not hacking. They are only saying it bc they are frustrated.
The best way I find to deal with these individuals is to shift the power dynamics from them to you. You could do this just by ignoring them and just keep playing your game.
But what I like to do is just say something like, "aww thanks, dude", and give them a big smile. I do this not to fuel their frustrations (they are doing that all on their own), but to keep my frame of mind positive and on the game. I find this tactic effective and I am less bothered by hackusators and trash talkers.
However, the best method is to compliment them. Tell them that they are really good players or something along those lines. This will calm the fire and you often see a shift in their behavior and hackusations. Give it a go. GG EZ :p