There’s nothing fun about the game, and you see people streaming it, it’s just building. That’s all they are ever doing. Just building crap.
To be fair, that’s always been a reasonable description of games like Sims, Minecraft, and most other simulation style games, depending on personal preference. Maybe the fact that you’re choosing to use it now means you aren’t as interested in that style of game, or even video games in general, as you used to be. Maybe not, but I think it’s worth considering at least.
I’m not saying it’s not possible that the Sims franchise has gotten worse. I’m just saying that lots of people would have described every Sims game in the same terms OP did. I’m also saying that your tastes and preferences can change over time. It’s possible, but certainly not the only option, that these two things are more true than it is that Sims is getting worse.