A lot of cartoons embody negative stereotypes. Foghorn Leghorn is arguably not a positive portrayal of Southeners and Pepe LePew is odiferous and has an antiquated view of consent issues - do they still show these?
Speedy Gonzales wears a sombrero (few modern Mexicans do), has a bad accent and IIRC a catchy or annoying song. “I’m here, I’m there, I’m everywhere. So beware.” The speed is in contrast to his slower friends and thus also is a stereotype. But at least he is usually the hero, though not to cats. There are probably more offensive things. Yo estoy hasta la madre / Que me pongan en sombrero…
But I am unqualified to determine how much a Mexican was, is, or should be offended by this, if at all. That’s not how it works. The Latino networks do show him. I do know lots of Indian friends who loved Apu and quoted him endlessly. But I can also see why some find him problematic (even though I think he is much more positive than not. Many disagree.)
The Mexicans I know adored the movie Coco. A more positive and realistic portrayal.