I have the exact same feeling with games as you now that I have a job and kids. I used to enjoy games like factorio (SimCity, Civilization, Roller Coaster Tycoon, etc) but they do feel like work now!
What I enjoy now instead is actually watching gameplay on YouTube. It gives me a quick fix of the fun without a big investment in time. Also many of the videos can be funny!
This is what I do too, either watch videos of other people playing new games or play the old games that I already know and love (Diablo, Alpha Centauri, Starcraft, Rollercoaster Tycoon, Minesweeper, etc.).
I would highly recommend Rollercoaster Tycoon Classic. It contains RCT1 and RCT2 scenarios and expansions recreated with the RCT2 engine. It's on iOS, Android and Steam. The game is a joy.
What I enjoy now instead is actually watching gameplay on YouTube. It gives me a quick fix of the fun without a big investment in time. Also many of the videos can be funny!