Well i wouldnt say everyone does, but quite a few people do. In my opinion i think its because Marge is not a very exciting character. She acts like every other mother does: Household work, taking care of the children, and teaching lessons. People find that to be boring, because they want a comedy show, not a show that has a character like their own mom. That would be weird right??? Thats why I think not many peple are fond of her
Marge isn't all that a fun parent as Homer is. She needs to put the mop and broom away and let herself loose and try to be an excited mom to Bart, Lisa and Maggie.