Trying to put in a new o2 sensor. Got a o2 wrench, no room to move even a single byte. A singular manifold bolt stripped so can't get that off rn either. Kind of screwed it seems

 

If you ain't got room, make room.. easy to remove stuff. Did you get a actual wrench style or something handy dandy like the crow foot style?

Here's what I use in tight spaces.
If it's really stuck when you get at it, try something like Releasall lube or bust out a propane torch and get the threaded portion nice and hot, heat will be your friend getting it out. Just make sure the flame stays clear of anything non metal!