You guys have a problem reading. I called their studios mediocre. That means it's average, moderate quality, not VERY good. But the average videogame studio is still PRETTY good. Most of the bad ones have already died off. Are their titles worth playing? Sure, especially on GamePass where there's no risk of being disappointed. They don't appeal to me very much, as I prefer top tier games in the AAA space, which I'll discuss in my reply to the following post.
None of the studios (bar one) I mentioned make mediocre games, all the games they have made review quite well, matching most of the output from Sony studios in terms of review scores, obviously SSM and ND is better though.
Critic and player consensus for all the studios I mentioned are 80s-90s:
Double Fine - Psychonauts 2, OC - 89%, Steam - 96%
inXile - Wasteland 3, OC - 86%, Steam - 87%
Ninja Theory - Hellblade, OC - 84%, Steam - 91%
Obsidian Entertainment - Pentiment , OC - 86%, Steam - 95% (Not indie would be Outer Worlds - OC - 83%, Steam - 84%)
Playground Games - Forza Horizon 5, OC - 92%, Steam - 88%
Rare - Sea of Thieves, OC - 67%, Steam 90% (OC includes launch scores, but being a GaaS recent re-reviews such as IGN and Gamespot are 8/10, backed up by the Steam score)
World's Edge - Age of Empires 4, OC - 83%, Steam - 86%
id - Doom Eternal, OC - 89%, Steam - 91%
Tango Gameworks - Ghostwire: Tokyo, OC - 77%, Steam - 82%, High Fi Rush, OC - 89%, Steam - 97%
Toys for Bob - Crash Bandicoot 4: It's About Time, OC - 85%, Steam - 87%
Beenox - Tony Hawk's Pro Skater 1 + 2 , OC -89%, Steam - 81%
Infinity Ward - Call of Duty: Modern Warfare II, OC - 75%, Steam 21% (COD lol)
Now you might not personally like any of them, but calling that kind of output mediocre? Please.
With the exception of Infinity Ward (which is just going to rake in billions with COD) all of the above studios last games have been really good. All of them bar Pentiment (which you can use Outer Worlds instead) and Age of Empires 4 are AAA games. These are the same scores that almost all Sony games get. Since the PS5 launched only two Sony games have cracked 90% on OC/MC and one of them was a remake. Extending that to the past 7 years (average console lifespan) that rises to a grand total of 4 games that have scored above a 90% on OC/MC that were developed by Sony.