I felt this way about an indie game that was actually very well received (https://en.wikipedia.org/wiki/Mini_Metro_(video_game)), and it was fun for a while, but it quickly grew old: the graphics are rudimentary (not expecting AAA-level stuff of course, but still, simple monochrome vector graphics get boring pretty fast), the gameplay is wildly unrealistic (stations popping up out of nowhere that you have to connect to lines which you can instantly change, even erase and rebuild everything, ad infinitum, trains that can be instantly teleported to a completely different line when needed etc.), and every game inevitably gives you a sense of failure, because sooner or later your network is swamped with passengers and collapses. So not really realistic, but the need to constantly optimize the network while the game keeps throwing spanners in your works quickly felt like drudgery. For some time I kept coming back because of the daily challenges and other stuff designed to keep things interesting, but after about one month I decided enough is enough and uninstalled it.