I've come up against this a few times (it sucks!)
There's a few things I try that might help you. These are just my thoughts and might not work for you but hope something helps
First thing is that you just have to abandon all hope of seeing a lot of flops with nice hands like 89s and 33. Hands that need implied odds to work cannot be played in this game.
Second thing is remember you will get paid on your monsters in the long run. If someone is snap calling you with 2nd pair type hands and raising 20x, that's great for when you flop big, or look down at kings. limp re-raising can be a great play here. Get QQ in early position, limp, one fish raises 15x, 3 call, you shove, somone spite calls you. Your crushing them in a heads up pot with added value from dumbass callers. It feels so exploitable and stupid to limp shove aces etc, and if everyone limps behind you it sucks, but it can be a profitable way to play. Might even allow more limping to happen later on.
Third thing is be super aggro with some hands that you might useually play more catiously, 99 for instance. This is a limp shove hand I think. If you limp and get to see a flop, awesome, set mine or i guess bet/shove if it's an overpair. If you get raised the useual 15x and 3 call, shove. You probably end up at worst with a flip, standing to way more than double your money with the extra callers putting in a freeroll of 30BB. Pairs have about 4% equity over two overs as well so it's a flip in your favour even without the dead money. You will also get werid calls from A9,Axs, 88/77, I saw a guy call off his stack with 27 once because he 'felt it.'
Last, AQ/AJ/KQ/AK and stuff, it's frustrating. There is an argument for limp shoving these but I think you have the odds to see flops even if it's for 15% of your stack. When you hit with AQ etc against these morons you are probably getting stacks in, maybe with two of them. It can drive you insane not hitting flops but you should be getting a top pair hand almost every 3 flops with AQ so be patiant and rake it in.
I try to avoid games like this useually because I think they are high variance. If I'm sitting at 1/2 and it's being played like 5/10 I would rather play elsewhere. but, that does not mean these games cannot be profitable.
Fish can always be exploited, hope this gave you some ideas.