First- all caps is like yelling . Stop it.
Lots of reasons- what was the nap size of the roller cover? Do you know how to lay off paint?
Semi is not easy- it shows all novice errors.
I'll try and find some basic rolling instructions-
Also- I work with remoddlers and strongly encourage them to NOT have the homeowner do the finishing. Like you said- you put a lot of money into a remodel- but the finishing is what you will always be looking at. You are proving my point. Sorry to be blunt- but it is the truth. There actually IS some skill to painting.