recently whenever i speak to my friends while playing, my team can somehow hear me and ask me to stfu. My team chat is set to push to talk but this still keeps happening somehow

Everytime I play deathmatch, I tend to use a sheriff more often, then switch to vandal in the last 10 kills. Most shots I will hit, but when players start strafing I can't hit a single shot with the sheriff or vandal. I hit aimlab for 30 mi...