Sorry if that sounded a bit dismissive. I've had a few drinks tonight so I'm probs being a bit more blunt than usual.
I think an important thing to remember is that youngish children, even adolescents really, shouldn't be playing these games. The Call of Duty series is maybe the closest equivalent to the Halo games nowadays in terms of toxicity. I just checked the age rating out of curiosity (I was sure it was Cert 15) and it's actually certified 18+.
It's really not a particularly gory game despite obviously being violent (objective is to kill the other team) and although it's rated 18+ you'd realistically see much worse violence in a film certified 15+. This makes me wonder if the age rating reflects the fact that you're interacting online with strangers via microphone with no real policing (you can report people after the event but nobody is monitoring in real time).
Interestingly, Nintendo (who have always been more family focused) don't offer a live chat function in their online games and I'm guessing this is why.
Online shooters have always been full of adolescent kids. There was even a term for the pre-pubescent ones - "squeakers". Even a lot of the pro players/streamers that compete in competitions for money are <18yo. However, you can set parental controls on most consoles blocking voice chat and online play etc.
So, whilst it's defo not excusable for teenagers to act the way they do online I do feel that parents need to be a bit more clued up than many are. Often it's just "here's the PlayStation you wanted for xmas" and they're left to their own devices.
That said, I'd defo say that overall gaming brings youths together more than it causes trauma. I've never met a gamer in real life that had any issue with interactions online. I've seen plenty of trash talk and arguing but that's typical teen behaviour tbh.
I feel like a big part of this is avoiding letting young or vulnerable kids online unsupervised. This isn't victim blaming. It's just potentially not a suitable environment unless you're well into your teens and able to give it back. Playing Minecraft with mates from school is probs OK. Playing online shooters with random adults and older teenagers maybe not so much.
But I wouldn't change my teenage years for anything. I'd probably hate being a teenager today tbh.