I can't remember the last time I struggled so much to get through a game.
You misunderstand. I'm not saying ΔV: Rings Of Saturn is a chore or grind. I found it hard because any time I boot it up, I can get lost for hours just playing it. Not trying to win, not following the story, not looking for (ugh) "progression". Just mining, exploring, idly drifting through the void. It is a game I don't want to exhaust because I'm enjoying it too much. I went back in "for a quick dive" twice during this intro.
It doesn't have Content. It's not one of those compulsive, manipulative forever games. You could barge efficiently through it, finding probably all its secrets and items as fast as possible. That wouldn't be wrong, exactly, but it's missing the point: this is a game to be savoured, not consumed.