That has happened to me so many times..... there is a content creator that I am genuinely interested in subscribing to but I decide to not do so until I can see at least a few of his full works.
When I find some, I've been disappointed nearly every time and have been glad I didn't. Not all, but nearly all.
I think it's perfectly normal. To put it bluntly, how long do you think it takes to create a proper piece of work? From what I know, genuine creators take on average anywhere from one month to over six months—or even longer—for a single project. You need ideas and inspiration. Even if you reuse old motion modules, you still have to come up with new combinations and rework the movements and camera angles to make them better and more refined.
As for the popular software productions nowadays, they basically just apply preset motions and scenes without any modification at all—or the creators simply don't have the ability to modify them. The only thing they can change is the motion loop (stretching the duration), turning a 30-second animation into one minute. Then they switch camera angles: one minute from the front, one minute from the side, another minute from a low angle looking up. And that's it—a finished "work," without putting in any real effort.
Yes, I'm talking about those creators from (KK, HS2, VMA). Their output is usually two to three pieces per month, depending on their computer performance. So one is carefully crafted and refined, while the other is basically copy-and-paste with different character models. Naturally, the difference in quality is huge. Of course, there are still some good ones—but out of a hundred, maybe only one to three are actually high quality.