I have a Nissan Leaf, which I think is the best-selling EV outside China. It actually doesn't have an actively cooled battery, but like every other EV I'm aware of, it has a water pump and coolant. The pump and fan can be pretty loud actually, especially while charging.
It also has all those same problems you described. Noise from the suspension that can't quite be pinpointed. Partially broken sensors feeding incorrect data to the ECU (usually means the 12V battery voltage is low). Failing to turn on then working just fine minutes later. Throwing error messages about brakes, or "t/m malfunction", or going into "turtle mode" when the battery isn't low, or other inscrutable conditions that usually solve themselves but lead to multiple annoying trips to repair shops.
I have read forums and talked with many Leaf owners in researching my own purchase, and while there have been a few niggles reported (random charging problems, or noises, or ...), none have listed problems like this, and not all in a single car. I suppose it is possible you got one car with that many problems (or one undiagnosed issue causing many problems), but then you should be returning the car as a lemon or taking the dealer/Nissan to court. For example, going into turtle mode when the battery isn't low would be inexcusable and cause for a complete fix under warranty.
But you can read the leaf forums as well as I, you know this is way out of the norms, so why do you write like it's expected of every Leaf? I conclude this is FUD.
It also has all those same problems you described. Noise from the suspension that can't quite be pinpointed. Partially broken sensors feeding incorrect data to the ECU (usually means the 12V battery voltage is low). Failing to turn on then working just fine minutes later. Throwing error messages about brakes, or "t/m malfunction", or going into "turtle mode" when the battery isn't low, or other inscrutable conditions that usually solve themselves but lead to multiple annoying trips to repair shops.
Don't you drive a Leaf too?