Yeah, but I don't think that stems at all from selfishness. Its a stretch to say the least. Him not wanting to step on the toes of who he perceived to be "this world's Superman" even though, in reality, he is this world's Superman (just doesn't know it yet) is not selfish. Its him trying to respect his legacy. Though, I may need to reread those last few issues to make sure I'm remembering correctly.
So, calling him selfish comes across to me as simply people who are averse to having an "older Superman" (who is "married and boring" or has the pre-Flashpoint memories behind him) finding an excuse to hate on him.