Recovering chronic overthinker here... you're overthinking this, man. Lemme break it down for you.
The thing about blaming someone is that, by definition, you are attributing wrongdoing to said someone; it's you saying: "I believe you are at fault." So for you to blame someone is to attribute a fault to that person. And not all faults are worth bringing attention to.
Here's a question for you: is comparing yourself to others a fault worth criticizing? You probably have a different opinion than I do, but I'll give you my two cents regardless.
I've always thought that the "wrongdoings" of a person aren't necessarily depreciating or harmful unless somebody else is being impacted negatively. If you do something I believe is wrong, sure, it might tick me off a little... but if it isn't harming you, and nobody around you is negatively affected, whether it be physically or emotionally or anything like that, then who am I to think otherwise?
It's a bit more nuanced in your case, because you haven't given any examples so it's kinda hard to tell what kinds of comparisons you're dealing with. So I'd say rule of thumb is that if you see someone is being negatively affected by this, then yes, you can blame them; if the outcome isn't negative, then considering it a pet peeve of yours and moving on is one of the better things you can do.
(Do note that we're not taking intention into account here. I'd like to believe in most cases, comparisons aren't backed with toxic intention, but rather with the intention to help in some way. Since that's almost impossible to measure, you can probably just ignore it. It's good to keep in mind, though, even if it's admittedly a bit too optimistic.)