I‘ve been spoiled by the kind of shower control valve that is just a single handle. Pull for water, push to turn it off, rotate to change temperature mix. At our old place, the shower/tub had two valves and the hot was extremely finicky. I just left the water running there.
My old house had those. When I first moved in, I notice two things:
1)The water heater was set to an extremely high temperature.
2)The shower didn't get that hot.
I took the valve apart and noticed that it had a plastic disk that limited how hot it could get. I adjusted it to allow for max hot and lowered the water heater temperature.
That was a dumb idea. You won't get scalded in the shower, but every other faucet in the house is a scalding hazard...