There's a trail lifecycle which is very poorly understood tbh. New manmade trail is usually smooth and shiny. That doesn't mean the trailbuilders want it to be that way or stay that way, it's just what happens when you compact dirt/rock/gravel, whatever you may be building with. Essentially the trailbuilders have made a trailbaby, which will grow in interesting ways
So, what tends to happen is- a bit gets a bit worn out (this might not be that obvious, it might be that it's draining poorly and so wear is accelerated, it's not necessarily a riding experience thing). So it gets resurfaced, and everyone spits the dummy and says "why have they built a bmx track!!2oNez!". Then over the next year or so it roughs up again and gets back to pretty much what it's supposed to be like. Then there's a long, happy midlife, until it gets a bit worn out and it all repeats.
Often trails ride best when they're right on the edge of falling apart, and worst when they're brand new but if you want a durable, longlived trail you can't have one without the other.