The problem isn't that they're overly negative (in the main, anyway), it's that they spout banal drivel that a three year old could come up with, whilst the bad ones also tend to jump onto the most recent bandwagon and then repeat it every five fucking seconds even if it's utterly wrong.
eg.
" X is a top, top player"
"If Y just played his best team every week until they all drop dead, they'd be really good."
" Z's best position is in the middle. He's a top, top player. But he should play in the middle. Because he's a top, top player."
When was the last time there was a decent bit of analysis on any bloody football program? MOTD2 seems the only one that actually tries to do it properly.