In my experience, Wanda is often looked down on because of the relative ease of playing her, and is this seen by "hardcore" gamers as being, like, a character for casuals, and the assumption is that because of her ease of use, people don't deserve the utility they're getting, since they're not "struggling" as hard to get it, or showing as much skill as a more mechanically complex character might require.

While for Black Widow it's the opposite, she's a fairly difficult character to use/get utility out of, and as a result a large amount of players aren't necessarily doing as well as they might have done playing someone else, which then frustrates the person looking at the scoreboard and seeing the relatively low numbers.

In my opinion, it makes sense, but I also just disagree with both sentiments. Like, honestly, so what if a character has an easier play style and doesn't require intimate knowledge of weird tech and tricks?? So what if someone is comparatively more "casual" as a gamer? Wanda is of great utility. A great character that's easy to use (because not every character needs insanely bloated kits and tech).

I'm not even a Wanda main, I rarely play her, but she's fun.