I really don't mind it. Mainstream music is popular for a reason. The only reason why people hate it is because it's ruthlessly repeated on the radios and is referred to repeatedly. Granted, it is getting a bit generic in terms of lyrics and sounds but there are some brilliant songs in mainstream music. It really isn't that bad. I think it's the new indie/hipster phase where mainstream music is looked down up even though, ironically, it's those people who make the "unknown" bands and songs top the charts.
I admit that more that 80% of my music is probably non-mainstream but overall mainstream music is O.K.