I think I need a new competitive outlet. Any recommendations?

I've realized that I'm not feeling very challenged. At first I thought it was because I'm not working on any problem that's super interesting at work but after talking to several friends I made the connection to me playing Dota 2. Whenever I've stop playing Dota, I end up feeling incredibly bored, no matter what other leisure activity I fill that time with.

While I'm decently high rank in Dota I can't help but feel that playing the game is a waste of my time, so I'd rather not have to resort to it as my competitive outlet.

The thing I enjoy most about playing Dota is getting better at the game. Basically I liked the fact that I could see my rating number go up over time. I'm not sure what kind of hobby or activity I'm looking for. I think I want something that's tech career related that I can put my time into.

Has anybody else been through something similar?