Um, no. But, considering he's one of the most revered MCs in the game, it is somewhat of an unpopular stance to say that he's not as good as a lot of other rappers.
Anyway, don't try to attack me on the not liking huge stars, because that's not my issue with Jay-Z. Put on "Big Pimpin'," "Girls, Girls, Girls," or "Dirt Off Your Shoulder," and you'll find me reciting the lyrics and fucking loving it. I love Eminem. I love Tupac; he's my absolute favorite rapper. If those aren't "megastars," I don't know what would be considered so.
And, my question to you is: in your mind, how does a white female listen to hip-hop and genuinely love it without being called a pretentious hipster? Because, that, as far as I can tell, is your real issue here. Never mind the fact that I actually DO listen to a lot of hip-hop by choice, simply because it was the first genre I fell in love with as a 10, 11, 12 year old, and it continues to be a sonic home for me—comforting, even. I'd actually love an answer to that question, by the way...it's not rhetorical.