Just lost 6th session in a row, constant coolers or just bad? Flopped AAA beat on the flop...

Coolers happen i wouldnt sweat these hands. Your main goal is to not make mistakes and these big coolers are not mistakes.

Your mistakes are probably more subtle, things that cost you little by little , things that you dont notice;for example calling pre too wide, i’d be interested to know what was the preflop action in that J9 vs AA vs QQ hand.

2/5 $1k max at a poker series, V2 had a large stack of 3k when i sat down, H started with 475, ran it up to 1100 in about an hour. Only showed two strong hands, played 7 or 8 hands before this one.

V1 tight aggressive reg in the HJ (750 eff)
V2 loose aggressive reg in the SB (3000 eff)
H on the button (1100 eff)

V1 Open raise to 25, H calls, V2 raises to 85, V1 calls, H calls with Jc 9c.

Flop Js, 9d, 3c.

V1 checks, H bets 150, V2 calls 150, V1 jams 670 eff, H jams 1000 eff, V2 calls.

V2 has AA, turn 3h and river a blank. Saw V1 just yesterday and he confirmed he had QQ.

Thought process was, V1 was pretty snug and likely raised pre with a premium, with J9 suited on the button, very playable imo. SB could squeeze with a decent range to 85 considering his stack size and our previous action. When V1 flat called, that ruled out AA and KK in my mind. So now flatting to close the action in position seemed solid.

When board gave me top two with a backdoor flush draw, and V1 checks oop, betting about 2/3 pot seemed correct. When V2 only flats, i feel ahead. When V1 jams, that feels like an over pair to the board, as JJ and 99 seem incredibly unlikely since there's only one pair of each left, and he almost certainly didn't open raise with 33's. I over jam to try and push out SB. Him calling with AA looks like a mistake in my eyes. Any review of this hand would be welcomed.

These have been my thought processes through this and other pots, but my bankroll is not happy about it

Well, first of all, calling the original open to 25 with J9 is pretty optimistic and certainly a higher volatility play, however, going back to Bart Hanson's 15-25-35 rule, you can certainly justify it. Calling the raise, however, is not justified under that rule. Whether or not you agree with that is up to you, of course, some people say that in 200+ BB poker that doesn't really apply, but calling J9s in 200+ BB play is certainly opening your stack to exactly what happened, and is therefore a high risk play.

Whether or not you want to change your style of play due to a downswing is up to you and your bankroll. Marc Goone would say that pushing every little edge actually lowers your overall variance, and I certainly agree with that, but you do have to be properly rolled for it.

Good Luck (I am also going through such a downswing myself)!

EDIT: Maybe run in twice if your casino allows it, and the other players agree?