Persona 5s music problem is that its generic anime music that blends together, meaning it has nothing that defines it, both in structure or thematically.
Because it is generic anime music, those who like it usually come from a background who dont watch anime, so it gives off the impression of being good music, when it is not. The nonsenical lyrics in the battle themes that loop on a 50 second timer is also a bit of a gimmick that gets tiring the 5th time youve heard it.
There is no thematic cohesion offered Personas 5 soundtrack that hasnt been covered already in just as bad a way as previous personas, thus it being in a blender where if you shared a random track of P4 and P5 without any monikors, people wouldnt know which belonged to which.