MCPE as in pocket edition? (there are others, just making sure)
As is, for a long time I was like that too, until I found someone else to share ideas with. Not even play with necessary. But this got me motivated to try new things and get more creative, and even give input on her builds as well. (I have a survival server) It's true I could play with worldedit, creative voxelsniper and everything else to create Rome within a day. But, I simply do not have fun doing so. We're both a bit older than the average players. But this does not take away that Minecraft, as is, can't be a creative outlet for all ages.
The youtube part I definitely agree on, most are heavily focussed on entertaining the younger kids. For older people just is just annoying how they put on a face and do everything for views.
Visibility have you tried other versions of Minecraft? This doesn't have to be an issue on other versions.
Buildings, even though I do have a survival server. This does not mean I don't use plugins. For example. Creepers can't damage buildings. Just players. We also found this very annoying, especially starting out trying to get by and survive. (same with fire spread)
Redstone, This can even come down to the server settings. It might be annoying, But understandingly so. The servers have to deal with lag caused by this too. Meaning it can break these things. Especially when having a larger audience.
Rewards from chest have always been a bit underwhelming. The only exception might be when just starting out. Even then, on multiplayer servers, many places tend to be luted.
"I hear people on youtube say how much they like Minecraft"
It's on youtube. They overhype EVERYTHING. Don't believe the hype. It's rather depressive how they make others believe it.
Do your own thing, find people who you can be creative with or motive you to be creative.
Good luck.