What's the best Instant Exchange to sell Bitcoin

I am mining Bitcoin and want to hold as much as possible, but to keep my machines running I need to sell some. I do not like using P2P because it takes too long and I have had issues before. Changenow froze one of my orders and that made me lose trust in the process.

I also do not trust centralized exchanges, so I avoid them completely. Now that eXch has shut down, I feel stuck without any reliable options left. Is there any method that could help me sell without giving up control or going through all the hassle, something fast and secure that does not involve the usual problems I have faced?