V1 - MP2, ~4k. fish that switches between loose passive and loose aggressive depending on whether he's winning in the game or not. Currently breakeven. Have played him last time about a year ago or so, plays way too many hands and calls out others who play a normal TAG game, but are "nits" in his eyes. Not really positionally aware. Large preflop raise sizing indicates an actual hand.
V2 - MP3, ~3k. loose passive guy who calls too much pre, but generally tight postflop. ~3k
V3 - HJ ~4k. Pretty bad nit, know he's capable of some big hero folds on the river, but that's about it.
Hero - BB, 3k. TAG, tightest image at the table after V3, been pretty spot dead this session.

V1 opens 100 (60-80 standard raise size at the table), V2 calls, V3 squeezes to 450, fold to hero in BB, who looks at QQ.
Hero?

Nothing much to say without some kind of indication of what you believe a "pretty bad nit's" squeeze range is. Absent any info it looks like a really close spot and I wouldn't fault any of your three choices too much.

I would either call and lead into the fish on non-scary boards or just chuck it.

Leaning towards just folding

I'd say JJ+/AK should be V3's squeeze range.
I'm pretty sure that me flatting pre will result in a 4way pot, with me having the worst relative and absolute position. I'm also pretty sure that if i'm 4betting pre, I fold out JJ and AK, and have V3 only continue with KK and AA.

If that's really the case then you could just make it 750 and fold to all in. Or maybe that size will ensure he flats his entire range. Re: your positional problems, it's not a big deal with QQ. The main problem with flatting is that you don't close the action and one of the other two players could wake up with KK+ relatively easily.

Calling seems okay if you think villains range definitely includes JJ or worse hands. You'll probably be able to shove any overpair on the flop for a decent profit if you really believe it will be a 4-way pot so frequently.

You mean c/s flop over V3's cbet? Sounds pretty bad to me, as i'm folding out pretty much everyone in the hand unless they have me beat
Based on reads, i'm fairly certain V2 never has KK+ as he's too likely to 3b V1 directly.
If i'm 4b to 750 as you suggest, V3 probably continues with his entire range, but i'm not sure what this accomplishes. He is still folding the part that i beat of his range to my flop cbet and calls with better..

He can't be so nitty that his 3bet range against two loose guys is KK+. That is just hard to believe. In fact I would think he opens his range a little against these two guys. Also you're 150bb deep which makes it even easier on you. I prob wouldn't 4bet though because you make it a relatively easy fold for him with hands you beat. I would flat and check raise a low board.

Fold.

probably cold 4-betting here. i think QQ is the bottom of my 4-betting range here but i would really hate calling and playing QQ oop against multiple opponents. i think i would 4-bet small to around $1k and fold if the hi-jack shoves. generally a random tag player sitting in a 10/20 game is going to take some squeeze spots pre flop with marginal hands and this would be a perfect spot for him to do so. i don't ever expect him to 5-bet shove with anything other than KK or AA so if we do get shoved on we can comfortably fold. if the hi-jack flats us (which would be weird) i think we just shove most flops. if we get any action from the opener or the caller we just go with our hand.

if you think calling with result in a 4 way i would prefer 4-bet>fold>call

i dont mind a fold, 3b "squeeze", if you even want to call it that, range from nits is generally super strong in live poker.

has v3 been calling a lot pre flop or just raising when playing pots?

Got my vote. +1

I think you can only flat with your stack.

Clicking is kind of interesting in this spot, if we do this and 3 better calls do we go with our hand (ie bet most flops and shove turn?). Personally I'd flat since this can't possibly be -ev vs described villians. Really not sure why anyone would consider folding here unless they think they are set mining hu oop. I don't think its unresonable to think we have the best hand here around half the time.