You should really try Rimworld. I am just like you. I usually downloaded (stopped bying them for this reason but I still had hope for one that would justify the money...) one of those AAA games, played it on a weekend and deleted them afterwards. Battlefield was perfect since they had an open Beta. Guess there is a reason why you have to pay for Betas today and Demos are pretty much dead.
Rimworld is now the only game I have and it is the first time I didn't regret a single cent I spend for it. Even when it's 30$.
Rimworld is a Base Building game. Handling may be compared to Prison Architect but with seemingly never ending depth (Prison Architect didn't work for me too...). The learning curve is part of the game and even now with the extended tutorial, you'll find new ways to optimize and new possibilities. The Modding community is very active too.
Also the reddit community is also pretty active: https://www.reddit.com/r/RimWorld