Some years ago, I took on the challenge of joining a company I used to think I would never join. The company's culture wouldn't fit with my working ways. In addition, the design principles are not yet at the level I expect; the design team is small and often finds it hard to protect their ideas or even propose what they think is good. However, I chose to join. I challenged myself to make a change to this company by injecting what I called an actual UX process into a heavy engineering mindset team.
At least you learned from it, and the team benefited from your willingness to try and learn.