I rarely ever play video games at all anymore, not even ones with community.
I suspect this is mostly due to “aging”. Although I don’t think it’s simply the process of getting older, but the process of long exposure to various games and game mechanics. At this point, for me, there isn’t really anything new or novel (how many times can a FPS be repackaged? How platformers can I play? How many times can an RTS be reimagined or re-themed?).
I don’t really think this bad. I don’t really care at this point, I either got my money worth out of the games in my library, or I didn’t.
I have sort of “moved on”, I have been trying my hand at making games (using Godot), which I find fun and challenging. I am just doing it for fun (making simple games for my daughter mostly, not taking it super serious or trying to publish/make money).
Why do you think it's a problem? I see it exactly like: "I like pancakes but not waffles. When I was younger I liked waffles more." Tastes change. Available options for food and games change over time too.
Also depending on when exactly you were younger, maybe the multiplayer games simply weren't good? For my timing, they first didn't exist, then they weren't good, now I'm not a huge fan of them, but they exist as a reasonable option.