Why don't you stop if you hate it? You don't need to 100% a game to fully enjoy it.
Patient Gamers
A gaming community free from the hype and oversaturation of current releases, catering to gamers who wait at least 12 months after release to play a game. Whether it's price, waiting for bugs/issues to be patched, DLC to be released, don't meet the system requirements, or just haven't had the time to keep up with the latest releases.
^(placeholder)^
Yeah just do what's fun. I find 100% games to be frustrating but a lot of the fun of Mario Odyssey was just casually playing around and trying to get lots of moons. When I got tired of that I just....stopped.
I don't and as I have stated, this is something I rarely ever do, I just kept it going because I did not want the experience to end.
To directly answer your question, no. They really aren't all that similar. I mean, they share the same "Mario" DNA. But being that one is in 3D and is a rather large hub/spoke world design while the other is a 2D linear stage based experience, they are dissimilar gameplay wise.
I would really urge you to try Super Mario World in particular though. This game is damn near perfect and holds up incredibly well today. It's just an amazing achievement and a must play title for everyone who enjoys games.
Super Mario World was my first game and it absolutely holds up. The gameplay is still as solid now as it was when it was released.