Yeah this is bullshit.
Master splinter was a rat, ratigan said he was a rat, all but that one fucking rat was evil in The Secret of NIHM.
And rats aren't hated because of their portrayal in media. Rats are portrayed badly in media because they're hated.
They're cannibalistic, they gave people the fucking plauge, they give people rabies, they chew on cords, wood furniture, and important wires that can cause fires, they shit everywhere and their shit smells.
If you've smelled a wild rat you'd think they're disgusting. If you had to pick up dead rats from the backyard that are so gross the dogs won't even eat them then you'd think they were disgusting, too.
And to top it off. These good rats are all clean and intelligent. Domesticated rats.
The bad rats are stupid, animalistic and selfish.