Movie theater viewing is superior to home viewing due to the communal experience and larger than life screens and sound.
While many of us have had bad theater experiences, many of us have also had bad days, experienced bad drives, bad vacations, bad trips, bad flights, terrible daily commutes, burned food we're cooking, had a bad relationship, etc. ad infinitum.
Bad experiences in movie theaters are misses not hits. Sometimes you have a slump, too, where there are many misses in a row and to you those become a string of hits instead of misses and start to represent movie going in its entirety. It's not true the same way you don't have a car accident every time you drive or have a flight with a screaming child every time you fly or end up in a hotel or AirB&B full of cigarette smoke and roaches every time you stay in a hotel.