There's a tiny loud minority of people who were really hurt when Bo was fired. They've become miserable fans, can't find a single positive with any aspect of the program and are now committed to spreading their misery to others. At the end of the day, they rejoice in N deficiencies and point them out ad naseum while ignoring or minimizing strengths/successes.
Then there are the folks who live in the past. All they remember are the highlights and measure the present against those highlights. Problem is, they don't recall anything but the highlights so their measure is more than just unrealistic it's fairy tale stuff. In the game of myth vs reality, myth will always win out in their way of seeing things. Believe it or not, there were plenty of low light moments and performances that went into building the glory years. It took time, trial and error, and years in the making.
Finally you have the impulsive/immature poster. The difference between a baby and a man is, the baby wants something and wants it now and if he doesn't get it will start crying. A man has the mental capacity to discern there aint no such thing as a fee lunch. Things aren't served on a silver platter and just handed to you on a whim in the real world. You actually have to put in time and some work to get what you want. Message boarding is the perfect medium for the immediate gratification crowd who still have a lot of baby left in them.