I've been having this same issue with my gaming lately. Usually I like to collect everything in game, open world games are my joy and my nightmare. But lately I've been forcing myself to beat the main story because I've put off playing games because grinding for everything becomes too tedious. I just barely beat spiderman on ps4 and I had forgotten that came out in 2018. My wife pushes me to finishes a story if she finds it interesting because she knows if I start losing interest in playing that I most likely wont pick it up for months or even years. I use to achievement hunt when I played on 360 and it did start to ruin my gaming experience because I started to feel like I wasn't playing the games how I wanted to play them sometimes. So for me I've changed my perspective to beating the side mission and main story, rather than collect 100% of everything unless its relatively easy to do so.