to be fair, that's just the Teams experience in general. if i leave it open for more than 4 hours, somehow it's chewing ~4GB RAM. i use the web client but, if i'm honest, i miss the notifications from that and miss meeting reminders :D
Teams on Linux is still Teams, but it works just fine for me. It can't do background blur, but is otherwise feature complete enough for me to attend stand-up on it daily.
Currently Teams will not work with my Mic. Half the time it doesn't recognize its there, the other half its there but not picking up anything. Every other app I tested worked fine with the mic except for Teams.
I've had to switch to using CHIME of all apps because that actually worked 95%+ time.