For me the biggest problem update was 1.14 - villagers and villages really sit in a bad headspace for me. The old game was deeply lonely. I mean it felt like you were alone in the aftermath of a world, because all survival Sims were like this at the time - a dystopian point about how society would end and the future would be primitive again. Minecraft does this in such a subtle way it's almost been written out. On the other hand, even extremely recent updates harken back to things the community has wanted forever. 1.16, 1.18 and the like are genuine to what mojang was trying to build 10 years ago. I think very few updates detract from this - polar bears, pandas, and a few other mobs. While other features that need it badly have gone without change. Dungeons, railroads / minecarts. The efficiency metagame is really a lot less enjoyable than it used to be. Bamboo farms? Villager iron farms? Its all junk that we've come to be used to. And not liking it, I feel left without options. Do it or don't, there's no second way or a less efficient method. And it all requires reading the wiki to understand these esoteric engine quirks and game knowledge... Which means I'm no longer learning and exploring for myself.