As usual, when I read a complaint about ED, my reaction is that the people complaining have unrealistic expectations based on having played simpler games in the past.
The fact is, there are tones of things out there to find. Have you ever seen this website:
https://canonn.science/codex/cartographics-exploration/
Your problem is, you are used to playing games that make you the star. You want to be the hero who makes the big discovery, and I get that, but that was never realistic in the games you used to play and it's not possible in this game. This guy summed it up:
space though, it's really, really, mind-bogglingly big. The chances of happening across any one thing are pretty improbable
If you're going to play ED at all, you need to look carefully at the following sentence, and take its message to heart: you're not special.
You are never, ever going to be special in this game. You're not going to be the guy who found the unknown probes. You're not going to be the guy who discovered how they worked. You're not going to be the guy who deciphered the message. You're not going to be the guy who found the barnacles. You're not going to be the guy who first encountered the thargoids. You're not going to be the guy who found the thargoid bases. You're not going to be the guy who found the guardian bases. You're not going to be the guy who finds a generation ship. You're not going to be the guy who finds the conflux installations, or the formadine rift installations. You're not going to be the guy who finds whatever else is in the formadine rift. You're not going to be the first guy to find any form of alien life.
All of those things and more are out there in the galaxy. There absolutely are things to find. But you're not special, and this game isn't the kind of game that bends itself to make you feel special. So you are never, ever going to be the first to find any of those things. And if you can't deal with that, then you can go play Halo and pretend that you're on the Pillar of Autumn and OMG Look! A giant ring space station!!
For all we know, there's a Halo or 12 somewhere in the ED galaxy too, but I promise you, you will not be the one to find it. That's just not how this game works.