I think something a lot of people don't realize is that inventory managment is more or less a *feature*.
That feature isn't gonna be enjoyed by everyone, and it's still not perfect, but you really can accomplish SO much with what's already available.
I know Minecraft has inventory problems, but it is amazing how much you can consolidate and be smarter about inventory space. Bundles, shulker boxes, and an ender chest are all godsends