Confession time.
...Pokemon Super Mystery Dungeon. Grill me for it if you want I guess, haha.
I picked it up for a trip I went on (because video games make travel way better) and I tried my best to keep playing it. I love Mystery Dungeon and I even adore Gates to Infinity but I just could not play SMD. It felt like the plot never picked up after several hours (I talked to a friend about this and he told me apparently I was still in the tutorial section? After like, 5 or 6 hours?) and it felt like the game just tried to cram so many new or interesting mechanics I couldn't keep up with and never once cared about it. It got to that point where since I was playing it because I was interested in Mega Evolution, I just thought "it's just gonna be some weird hard to understand gimmick isn't it?" and lost all my interest. Every dungeon I went through felt like a slog until I was finished so I could save the game and stop playing. I want to give it another chance one day! I'm just unable to right now.
Other than that, another game I'll probably never finish is Love Live School Idol Festival All Stars, because it's a mobile gacha game I play daily and don't spend much money on. Stuff is still releasing for it consistently and it probably won't stop updating any time soon. The game can be pretty grind-heavy and you don't really get enough resources to level up the amount of cards you get if you're free to play. And do gacha games really have an "end"?
Not that I want it to end. I don't.