Just me :)
First StartUp was amazing, super professional people. Run out of money and laid people off (StartUp still lives and grows now)
Second StartUp was led by mid-twenty Bros and not the culture I wanted to be part of.
Third StartUp led by people bought in by a bigger corporation. Had no idea how to run a company. Best team I have ever worked in but worst business I ever worked in as well. Almost everyone left after being there for 6 months.
Fourth StartUp ad tech industry. Learned a great deal, solid co-workers, but had enough of "We are a cool StartUp" vibe and went freelancing.
General speaking, I don't dislike StartUps, but oh boy I am too old for this now (35 years old).