As someone who only plays a few games a year (outside of Nintendo games) Game Pass at $15 a month is a bad deal. I would rather pay for 3 games a year, heck even 3-5 at discounted prices, and own the games versus paying $180 a year for Game Pass to rent games. If you play a ton of games that are on XBOX / PC it's a great deal, I just don't have the time. There's a reason the Halo Infinite campaign at $60 is one of Steams best sellers despite being on Game Pass.
Also, if you get invested into a game and want to buy DLC, season passes, etc then none of that is included with the standard Game Pass version. At that point you are then buying DLC for a rented game on Game Pass.