I thought Starfield was mostly OK and I played it for about 150 hours including the 'Shattered Space' DLC (100% completion/achievements on both). It was surprisingly stable and bug free. All I ever encountered were glitches which were mostly pretty funny when my companion would jump on furniture or endlessly run against a wall... stuff like that.
I didn't think that Starfield felt "endless". If you would ignore the side quests then it could probably be done in 30 hours or so(?). The DLC was crap though.
That said, this guy is not wrong. I have been trying to play/finish Horizon Forbidden West (HFW) over many months now but can not really get myself to make much progress due to fatigue. I actually felt my first real open world burnout last year when I arrived in the open world of HFW (the intro is taking place in a more confined area) and opened the map for the first time. I lol'ed and quit to desktop.
That game's world is insanely large and there are sooo many POIs and icons for collectibles/activities on the map, it is simply crazy, exacerbated by the fact that the game now has diving (huge underwater worlds as well) and even flying.
I never felt the same with Starfield which seems natural because Starfield is way more segregated. There isn't a singular huge game world. There are many planets and they have a lot of terrain but everyone knows that the game is structured in a way that you don't really have to go to any POIs unless a mission leads you there so you can safely ignore all the copy & paste, or even auto-generated/procedurally generated, content.
General huge game fatigue is nothing new though. I have quite a few huge/long games in my backlog and I definitely tip-toe around them when deciding on a new game to play. Most of the time I go for something more easily digestible because even just the thought of tackling a 200 hour game feels exhausting already.
At the end of the day, the simple formula quality > quantity remains a universal truth imo. Starfield did have some quality quest lines like the infiltration of the Crimson Fleet as a UCSysDef agent but it also had a lot of filler and the DLC was just plain garbage. Like all devs, Bethesda should put more emphasis on quality content instead of filler content. As a bonus, games will require less budget if they are smaller. Just do it and don't try to make a game "epic" by filling it with junk.
-=Threadcrappeur Extraordinaire=-