iCloud doesn't back up music I've added to my laptop iTunes

I'm curious if anyone else has had this issue. I purchased a new new laptop and supposedly transferred everything over from my older laptop. I noticed that a lot of my iTunes music didn't transfer over to my new laptop iTunes. As I did some research, it seems that Apple iCloud doesn't backup "non-iTunes purchased music." Everything I loaded from CD's I have and had, was missing. Plus, Apple has also made it more difficult to add music to iTunes (unless it's purchased from the iTunes store.

Why am I paying for additional iCloud storage when all my music isn't being backed up?

Why do I have to pay to add some other application to my laptop that will back up non-iTunes store music?

And now, when I synced my iPhone to my new laptop, most of my music now has the wrong album cover associated with the music......

I'm not the brightest bulb, but I'm not a dope either....as far as I know. Why has Apple become very user unfriendly (my opinion)?

I just want to listen to my music and relax, why is that so difficult....