To put it simple. You say there's no problem with having a problem with Brew's personality, just because it's not real. The pot analogy makes reference to the fact that the sound of water droping on a pot is annoying for some people. And if that people sees a depiction of it, they are going to get annoyed by it, despite not being the real thing.
Catena had something like it; yet, the authors managed to fix it in an appropiate manner. They were having an insane (yet digestible) humor comic where grown people (furries actually) where supposed to act in a childish way. Then they suddenly begun developing more elaborated arcs, like slight-of-life and the sorts, and that started to enter in conflict with the original premise of the series (reference jokes, and odd behavior. They fixed it by rebooting the comic into a more dramatic setting, allowing for more complex stories and character development.
What they did in SM was just to bitchslap (no-pun intended) character development in a comic where one character was a straight-woman, and the next one an A-class, A-hole just for humour. Specially when this character starts accepting a character after another one acted in a completely opposite way. And this is pulled out of the authors butt. Suddenly he becomes good, and people accepts him. That only demostrates poor writting skills. And there you have why people hates SM, and Monique.
You know, some people out there actually puts a lot of effort into making their works consistent. When people comes and recklessly does what this guys did in SM, pretty much they feel like dying.When you said "M tags along B, despite him being a dangerous asshat and she doesn't likes him. Then B's personality takes a u turn and acts in a contradicting way to his own self." , people over the net felt like being fooled into accepting something they didn't like anyways.
Want another example of kidnapping done right in comedy? Sequential Art. A roommate is confused by evil people and thus kidnapped. After a short (2-3 strips developing) a character by demostrating how dumb she is (remeber it's comedy), we get to see the evil as a batshit insane computer which plays dolls with corpses (not graphic violence for the sake of decency). In the end, nobody end up loving nobody, nobody's personality got a sudden turn, nothing got be developed any further. Indeed, more annoying characters, rescued from the kidnappers, were added to the cast to the dismay of the original cast. See the irony in there? See how properly handed was the whole subject?
Again, you can be a fan, and we still hate that shitty, poorly-made comic. You asked why people hated on it, and you got your answer. Just don't try to justify it by trying to glorify a one-dimensional character's random, yet unexplained, actions.