Why are you letting your stack get down to 4 BBs?
Your shove was fine given the stack size, but you had no fold equity and UTG was calling 100% with ATC. You weren't in too bad a spot with ~40% equity to win...but even so, it's just a really bad spot to get yourself into.
Don't let your stack get this low as it does nothing for you and just puts you in these awkward spots. Find spots to jam your stack in and pick up blinds/dead money, but do it when you do have a stack with some fold equity. It's always going to be better to find a spot to jam 10 BBs with a weaker hand and some fold equity, than it is to fold to ~4 BBs and jam with no fold equity.
I'm working on a short stack late stage MTT thread. I think you might benefit from it.