I'm inspired to ask by another thread.
Restricting myself to those I sat right through and didn't turn off/walk out of, I'd like to start the roll of shame with
Braveheart
Pretty Woman
The Postman Always Rings Twice (the Jack Nicholson/Jessica Lange remake not the original)
Top Gun
Beetlejuice
Absolutely miserable after yet another social gathering...
Soop's kitchen for kindly folk.
Food bank rollercoaster. Huge empathy to Fury!! Is it just me?