I've had more good experiences than bad but oh brother do those bad experiences stick out. Getting called a "n***er jew" (I'm not black nor am I Jewish lol), a noob for dying when that shitbird was already dead, people munching on chips, loud dogs in the background, etc. It can be brutal with LFG groups sometimes. I've also had LFG groups who were so chill and hilarious. Everyone apologizing for dying or messing up and then everyone else says we've all been there, don't sweat it.
I've been lucky enough to find a good sized clan of local players here and everyone's cool. We've even met up for dinner and beers but that doesn't stop people from raging sometimes, lol.