I'll take a stab at that, netnuts.
I haven't seen anyone call Mira a "clueless bimbo with no talent". On the contrary, I've seen many people remark that they think she is quite talented. Her consistency is to be admired. What bugs people about Mira is that she seems deluded about what her strenghts and weakness are. After competitions, Mira and her mother constantly complain that the judges are robbing them. Rather than looking at the results of a competition and seeing what can be improved, they seem convinced that there's nothing wrong with Mira and they've been hard done by the judges. She's also criticized her coach to the press, which imo, is really uncalled for:
"Okay, so my circular step sequence was a Level 2 -- I was trying for a Level 4, but I was pretty sure I would get a Level 2 if I didn't change footwork before I got here," Leung said. "It didn't get changed because ... well, ask Joanne [McLeod, her coach], she thinks it doesn't need to be changed."
http://www.canada.com/vancouversun/features/2010/story.html?id=013471a0-fd6e-4b14-a4cc-5b8e24790093
Compare her attitude to Joannie's, for example, in
this article. Joannie seems to accept her weakness and wants to work harder on what she needs too. Mira, on the other hand, seems to be blaming others for her own flaws.
Mira's skating skills are really bad, so is her posture, stroking, edging. Her jumps are barely eeked out and have almost no flow out of them. She can land jumps, but a lot of the time, they're underrotated and receive no positive GOEs. These are things she could improve on if she worked on them, but she doesn't seem to be aware that she needs to. There's more to skating than just landing jumps, and Mira's in-betweens aren't very good. As worlds showed, if her jumps fail, she has nothing to fall back on, even without the two falls, she would've still come in last in the FS. That's why she finished second to Joannie at Nationals - her basics are really bad. As long as she's brainwashed and under the total control of her mother, she's never going to improve. What she needs to do to improve is get away from her mom, get a tough coach and rework her skating. She's never going to get better otherwise.
Why Mira was criticized for showing up in torn tights, dirty boots and peeking undies at SC, is because she's not only representing herself, she's representing Skate Canada. Looking like that at a major international event is completely unacceptable. You don't need to have major $$$ to look presentable and I fail to see how Mira, who has been in the senior scene for a long time, is blind enough to not see the standard she's expected to uphold at such an event.