I think others were referring to the fact that Suicide Squad was playable a few days early by people who preordered. It definitely wasn't in "Early Access" in the way Satisfactory is. They're two different concepts, and people are just confusing things by calling the relatively new phenomenon of letting people play a AAA game early by a term that already exists in the gaming space.

Regardless, indie devs that choose to release a game as "Early Access" (as in the Steam model) have made a decision to offer the admittedly incomplete game to players for a reduced price, and then including those gamers' opinions into the development of the game. If you buy an early access game and you're upset that it's not finished, that's 100% on you. When you get an early access game, you've accepted that the game isn't complete. That's part of it. That's what you paid for.