I find movement to be distracting as well (esp. if I'm sitting next to a high-traffic aisle as I was in one short-lived position). However, what's even worse for me is when several different conversations all start up at the same time, in the same space. Americans are already extremely loud talkers, but then stick a bunch of them together in one room, having 2-5 different conversations simultaneously, and I truly don't understand how anyone can take it, or even understand whichever conversation they're part of.
If you have an hostile manager or HR department then yes it's time to move on.
For anyone reading this: if you ever find yourself placed in a "PIP", leave. That's like being inside a black hole's event horizon, you'll never come back.
That said, I have seen people come back from a PIP and kill it, to the point where on their next review they get all of the equity they lost in the prior cycle plus the comp from the new cycle. Obviously this is rare, but I have seen it.
Sometimes you have to vote with your feet.