Nothing wrong with middle men per se, but problems do arise when we all rely on the same middleman: those become way too powerful and can do nasty things.
By that time, no one can do without the nasty middle man as we have forgotten or never learned the skills to fend for ourselves and are thus beholden to the nasty middle man.
Network effect compounds this
As long as you have plenty of competing middle men, like we do for eg social networks in the real world, it seems all fine.
Remember: Facebook is for grandparents, not where the cool kids hang out.
Where do the cool kids hang out?
In a cool club on the other side of town, where the real cool kids go to sit around and talk bad about the other kids.
Yeah, it's a real cool club and you're not part of it.
That's ok, I dont really like clubs. Too many people
A while ago it was Instagram or perhaps tiktok?
However, take the fact that I have heard of these places as strong evidence that they are no longer cool.