Worse dev experience: Working for a company that had a monopoly in the market. They have Dinosaurs that didn't want to upgrade the user experience at all because of the company's hold on the market and their lack of forward thinking. It's a privately held company that is hard to get terminated. It was frustrating because they could do more but didn't so I'm looking to compete once my non-compete is up.

Best dev experience : Quitting the aforementioned job and getting another one. 😎