Well... Slack feels like they have one person working on it dev wise, I havent used Meet in a while, but if its still a in-browser only thing, yikes, and Zoom... that is some legacy feeling app, I dont know how anyone can love Zoom. They bought out KeyBase and didn't even build a better platform. KeyBase was top tier, I'm still sour that the dev team basically stopped maintaining KeyBase after Zoom bought them out.
Teams took the best bits from Skype and whatever that other service Microsoft had for businesses and their phones and started over basically.
I still have pet peeves about Teams (like why dont the 'Teams' within Teams have proper group chats like Slack would, its ridiculous!) but it could be way worse. After years of screensharing hell I can finally move the stupid top bar out of my way when trying to hit 'Debug' within Visual Studio at least.