Helldivers 2 is pretty fun when it works, but the game is racking up technical debt at an alarming rate. There's been several updates and balance changes focused around fire damage, except the fire damage over time effect only works for the player hosting the game, and that bug has been in place for months. There's still tons of matchmaking bugs and crashes, such that you sometimes spend 15 minutes just trying to actually play the game. Arrowhead is aware of these technical issues, but has mentioned that they cannot fix them because pushing new content is a higher internal priority than maintenace, and their team is too small to effectively do both.

Honestly I wouldn't just avoid it, but I'd avoid any Sony published multiplayer title in general moving forward. It seems a lot of them end up in this situation where the game prioritizes adding more monetized content to the detriment of anything else.