Why do modern games look so "fuzzy"

I rarely play anything from the past 5 years but when I do there's a noticeable difference in how the games are rendered compared to up until the early PS4 era. Transparent voluminous materials like hair or foliage have this fuzzy pixelated look to them, and there's a lot of rasterisation that looks like it's being rendered on the Sega Saturn. Then there's tons of odd shimmering going on everywhere, and I'm not sure if it's due to dynamic resolution scaling, ambient occlusion or dynamic reflections

Overall games don't look quite as sharp and defined as older games though they simultaneously have lots more detail. It's weird