Single player games don't allow players to interact with each other or even compete so there is no way to make people salty.
I think you had never played X in it's early days. Even now, it is cracken unplayable unless you keep moding the game and even rewriting some mods to the pont where it becomes playable and at least a bit hardcore. Those NPCs which do keep talking and talking and their chatter being unskippable, and while you need to give precise orders to five fleets while them being under fire; those obnoxious speech minigames, battlecruiser with huge spinal gun which tires to broadside every time it is in combat, shipyards which do not build anything after 20 minutes in the game because economic supply lines are a bit cracked up... ughhh, the pain is still in me.
And thing is, even XR have every single feature ED have, exept 1-1 universe and planetary landings, and crapton more above it. And it can keep me for 200 hours tops, after that I forget about the game for a year or so. Because it is a single-player game, no matter how much I can mod it.
About griefing, there are two types of it: those which can be avoided/combated, and those which are not. Former one is a welcome addition to the game in my books. It adds real fun and challenge, no matter what I do. And about all the ways to grief people which are left in ED are of that sort. But thing is, solo just provides you with efficient way to do your short-term goal. And that just outweights it when looking for pvp is npt your current goal.
And the latter, where griefing cannot be avoided/combated, or you can do so with severe drawbacks only, are being removed from the game quite fast, in form of ridiculous loitering laws, etc. As they should be.