Merge multiple Apple IDs without using Family Share

I have 3 different Apple IDs by accident, some as old as having an @aim.com address tied to them however they have purchased music under them. How can I merge these Apple IDs that all belong to me under my current Apple ID without using Family Share? Having to manage them using Family Share is preventing me from actually having my family in my Family Share account since it’s limited to 5 and I am taking up 3 of them myself, which is quite disappointing.