Obviously this is not a big deal but it does irk me sometimes when people include ableism alongside the other isms or when they say shit along the lines of "as a disabled queer POC". The logic being whatever aspect of your identity "disadvantages" you the harder you have it and the more righteous you are. It really is straight intersectional bullshit and trivializes the fact that race and gender are all things that are violently enforced to maintain the political rule of capitalism. It is true that disabled people suffer disproportionately under capitalism, especially under the pretext that all humans must work to produce value for profit, but hell capitalism fucks over all kinds of people. At the end of the day its just not a special form of oppression that deserves the same level of attention as forms of oppression literally centrally to capitalism. The reason questionable languages like this takes hold is because there is a plethora of liberal or straight up reactionary theoreticians the likes of Slavoj Zizek and Judith Butler that dominates the intellectual sphere and the revolutionary kernel of Marxism completely buried under paragraphs after paragraphs of indecipherable bullshit made up so some humanities professor can keep their pathetic job.
I think if you look at the history of ableism you'll see it's been just as systemic as the other isms. The US used to have ugly laws, that is laws against people with unsightly appearances, deformities, disabilities. Those people were cited in violation for being visible in public. If you look at how deaf people were treated...just horrible. These things have been violently enforced. Let's not forget asylums, sanitariums, forced sterilizations, forced lobotomies, etc.
Sounds like you're just mad someone on the internet for being self-righteous and are trying to attribute it to them being the wrong kind of leftist. But I think history pretty well justifies the "level" of ableism.
https://en.wikipedia.org/wiki/Ugly_law
Literally banning unsightly disabled and poor people from public. Yes it is intersectional bullshit because class intersects with these things.
I think also the widespread use of intersectionality causes a negation of it in reaction whereas the Marxist-Leninist term coined by Claudia Jones "layered oppression" inherently relates how systems of oppression interact with more clarity.