I think some of the reaction came to you saying conflicting statements. You first said you didn't like your dojo, but you didn't want to leave because you felt you had made progression, you knew people, etc, etc. All of these things are understandable, but then you made a complete 180 and said that you were leaving aikido all together because all aikido dojos must be the same. It sounds.... a bit odd.
IMO, that's not really that unusual. Often people who feel strongly about something can have a strong reaction against it if they become disillusioned. That kind of all-or-nothing feeling seems to happen to a lot of people in all kinds of situations.