like this is population pool dependent. At 50z, I'd be folding.

preflop 3b isnt std fwiw

I think 3b is std given his stacksize.

well, I really don't like the preflop 3bet:
- It is so transparent, easily put you on: QQ+, AK / without info
- ALL the villains ship it in with KK+, AKo

I think, cold call is a better option:
- you dominate UTG
- most of the time you will play postflop IP
- if others also cold call, you can have the top set, AA/KK would 3bet
- if UTG has the AA/KK cold call is also a better option instead of pre stack off

...
As you played... If you don't know that he is a maniac, you can fold here.

I'd fold and wait for a better spot. Raise bigger though. Like Telsa said, that 3bet pf is really transparent.

You can min-thin QQ mp vs utg (2.5x 3b) if you're not comfortable going for a full-size 3bet. I think it's good.
Calling is fine as well - most likely better especially if utg is on a 10% opening range. Against a lag/rec I 3bet this every time pre.
I'd call this shove with QQ+ AKs fwiw. I could be convinced that QQ/AKs are folds as well after rake consideration.
Pretty sure that even if you're flipping a lot of the time QQ and AKs are both slightly ahead of his overall range. Enough to make this call +EV. You can also discount AA+KK at least a little bit from villain's range.

It's a close spot imo but villain seems to be pretty bad so I really want to take my chances, and get his money before someone else does.

Call it, AK and QQ/JJ should be more likely than KK/AA (AA/KK would not want to shove, whereas with AK/QQ/JJ villain benefits from having FE and not playing postflop).