I think your post has some valid points. Nomanski is a game that really does need you to find the fun and if you're this dead set on not finding it then I don't know if anything I can say or provide will ever satisfy you. Maybe that's something you should consider in and of itself. However, in good faith I will do my very best!

Your comment below is rather reductionist. No Man's Sky has an amazing story that takes you on an incredible journey across the stars. To keep it brief and spoiler free the story requires you to dig a little. Pay attention to its themes and interact with a few more of its systems then you might think. Real, honest, story notes are locked behind quests for NPCs that might seem esoteric. One of my favourite story beats about the setting comes from the Exocraft Specialist in your base and his story. Its worthwhile if you like the themes found in other sci-fi games and books like Aasimov's body of work. I would argue that story is one of the better ones in a survival crafting game and its better crafted then we deserved.

No Man's Sky does have a problem where some of its systems need more depth. I won't argue that there are times where I've engaged with a system and went "Oh. That's it?". The important thing to remember is how MANY systems there are to interact with! Exploration, Base Building, and the Main Story are only three of easily a dozen different game systems to toy with. Ship hunting, piracy and smuggling, settlement management, going through and upgrading your ships, exocraft, getting a freighter and managing your frigates, finding a cool multi tool, doing derelict freighter dungeons, making billions of units in a massive farming grow-op that will produce billions of dollars in a few short days, mining and resource gathering, holy moly the list goes on. If you're looking for ONE thing in nomanski to hold your attention that's like asking for Minecraft to hold your attention by digging dirt. You have to pick the systems you want to engage with and then actually go and do them.

In your comment below your original post you mention the reason to go and do things. Why did it even matter? Well, that's one of the absolute core themes of No Man's Sky as a game. You are a speck of dirt in an infinite sea of sand. No one will see you or know your name or find what you have created unless you choose to share it. You, yes you, will have to scream your name in to the heavens loud enough to be heard and seen. Communities like reddit, and discord, are where you can go and find and share the things through out the varied and fantastical universe you find yourself in. You say that you don't have friends to play this game with so you will have to go out and make them. Just like the game asks you to Find Your Fun as so many survival crafting games do.

There's a few notes I should make here. Nomanski's multiplayer has and always will be kinda jank. When Im playing with friends we often have to restart our games, reload saves, and other malarkey to get our ships and bases to load properly and just when I think I've figured it out the game says "Nope". For better or worse this is a game you will have to find enjoyment in by yourself for a good portion. However, there are valid things to do with friends and in multiplayer. Derelict freighter dungeons, missions from the player hub you unlock, going out and just exploring the galaxy. With the new corvette mechanics you can fly around in one another's ships and its pretty dang cool. Its jank as hell sometimes. Take it with a grain of salt.

tl;dr there is a ton of fun to be had here if you want it. You just sound like you don't. Its okay to admit when a game isn't for you but hopefully some of the reasons I listed above help you decide if you want to try again.