It's not even that so much, you can excuse a player like that so long as doesn't ruin the rest of the side. Hernandez thrives in various different systems at Man United and with different partners, Inzaghi did throughout his career.
But every time you play Bent you HAVE to build the side around his ugly strengths. He's just smack average and not worth it. In all honesty he'd have probably been a better fit than Cisse for us last season the way we were set up to play, but by christ if that's the long term future of the club
I'm against the Carroll signing, but I'd much much much rather have him than Bent. I couldn't think of much worse fits in terms of signings, apart from maybe Carlton Cole.