As I've gotten older and have less time to commit to competitive gaming, cooperative gaming still lets me enjoy challenging multiplayer experiences without having to worry about ELO or keeping up with the current meta as much.
As much as I love Helldivers (and I am very excited for the sequel coming out later this year), Deep Rock Galactic is undeniably the champion of the cooperative gaming genre. You can jump into almost any lobby of random players and be rocking and stoning together instantly. Deep Rock Galactic features many game mechanics that just naturally result in cooperative play, without the need to rely on voice or text communications (though, voice and text are available and used).
Not to mention that the devs are really really amazing. Seasonal updates always come free of charge. They have a battle pass system that is 100% free that just rewards cosmetics. If you don't get battle pass cosmetics by the end of the season, you can still earn all the cosmetics at a later date. The only DLC on offer are cosmetic packs, which are really cool, but the cosmetics you can earn in-game are also really cool. There's no pressure at all to spend more outside just buying the base game. I deeply appreciate them and how they conduct business.