I think fans get taken for mugs when the board and manager can say anything they want, blame anything they want on them and not bother listening to any of their concerns and yet continue line their pockets and fail to invest.
It's one thing a club not being successful, it's totally different charging sky high prices and treating fans with contempt however. Some fans kick up a fuss when things aren't as they should be, so not all fans sit their and accept it.