Overwatch has similar issues - common advice for playing Competitive is to just completely disable text chat and voice chat. Yeah, you'll miss genuine, helpful suggestions, but they're a tiny, tiny minority of messages at the lower ranks. Not that it necessarily improves a lot at the higher ranks, as I understand it, but is less awful.

I don't play a lot of competitive Overwatch, but it's definitely a much nicer experience with chat turned off, even if I'm not the one being flamed, even if we lose because people are typing instead of shooting.