And it's worse than Teams

In no way is Gchat worse than teams. It's basic, but the basic functionality works... which is a lot more than you can say for teams.

I used it for about a year with a small team. It worked well for what it does, but the functionality is definitely stripped down and barebones compared to Slack. I don't remember any performance or reliability issues.

It’s fine if you want a barebones chat.