Rant && Question

My asshole manager got me shifted from a better team back to my original team. I didn't have any problems in that.

But now when our QA team has also completely resigned, he wants me to work both as dev as well as QA. I joined at a developer position.
All seniors in my team (Tech lead, product manager) are technichaly incompetent.

I am a fresher and don't have any other offers as of now, don't know what to do?