No it definitely is, the questions and comments here get respectful and goodwilled replies (most of the time that is) while on reddit i would get 3 comments degrading me for my choices 1 that says im stupid and should do my research 2 trolls 1 actual answer to my question and ankther person telling me that they're better cause they know the answer. The "redditor cliché" is not so much a cliché as it is an actual representation. At least in my experience.
In short this place is not nearly as toxic as reddit is
That's just Lemmy being a smaller community. I've seen plenty of toxicity on here as well. In a way proportional to the size of the community. And especially more on some specific instances.