The Hugo and Nebula winners (and shortlists, do not forget those) aren't perfect, but they're almost always worth a look. Pretending that they're total garbage is doing yourself a disservice.
Wow, I hadn't heard about the fraud in 2024, which I looked up in response to your comment. That's troubling to say the least.
Bias, though, is going to be inevitable and the Hugos are going to represent the taste of the Worldcon voters. It seems like overall there's been a happy confluence for awhile now between their taste and general sf taste.
I've discovered three of my favorite contemporary sf authors through recent Hugos: Ann Leckie, Arkady Martine, and Tamsyn Muir. I've read other recent nominees where I was unmoved or even questioned their inclusion.
I've also read a decent selection of historical winners, by no means exhaustive or even the majority, and the worst was without a doubt Hominids by Robert J. Sawyer.