I do the exact same thing, not just with games either, with TV shows (per season, only watching the last few episodes of a season after the new one is out), movies, and books. To this day I haven't played the last two hours of GoW, the last 6ish hours of RDR2, and countless more. I also haven't seen the last few episodes of Mandalorian, The Boys, Mindhunter (please, please give me more), The Witcher or Loki.
I'm not sure it's cause I don't want it to end though. I'm the same way with anything not just entertainment, as soon as I get comfortable and feel like I understand or can predict something I loose interest and move on to something more new, challenging or mysterious. The trailer for the next season is more interesting than the ending of the current one. I guess I like asking questions more than getting them answered. I constantly have to fight against that instinct at work or we'd have endless feature creep.