That would be mostly due to the spectacularly wonderful cabin crew.
The E145 can only be popular with midgets. Horrible nasty little aeroplane, with the most stupid galley arrangement making boarding and disembarking as much of a pain in the ass as having to double over in order to be able to walk down the horrible little cabin, before tripping over that stupid bloody little step attempting to get into your seat. Sooner it's gone, the better.