I mean, maybe, I guess? At the very least I think that "anti-boomerism" can be an exercise in understanding survivorship bias. We know very well that marginalized groups tend to have shorter life expectancies or lifespans, and this was especially pronounced in the boomers' birth-years. We know that, for instance, a lot of the key figures in Stonewall and the 20th century LGBT rights movement thereafter were of the baby boomer generation or on its fringes, but very many of them succumbed to AIDS or any number of other tueurs long before the modern-day anti-boomer sentiment could emerge.

So I think this is the important thing for people to keep in mind. That when boomers seem to "be a certain way", that it isn't anything inherent about boomers, but more because a large share of the boomers that one will have to interact with on a regular basis are going to be those who were "privileged enough to survive". This thinking extends to understanding that there are also those boomers who were fortunate enough to survive, and that there are also those boomers who are now a bit less privileged than they used to be (e.g. old age or disease brings its own forms of marginalization).

But maybe I only reached these conclusions about baby boomers because I have '60s parents, of which one died when I was young for reasons I'd consider to be directly tied to being in a marginalized group, and I myself have this medieval serf ass life expectancy. For someone else with different life experiences, I can see how "anti-boomerism" can be something much more reactionary, if they aren't willing to look at both sides of the coin as it were, and instead go "boomers make me angy therefore old people baaaad, got dang moochers got to live life on easy mode now expect me to pay for their golden years" or whatever.

Edit: Like another comment says, zoomers would be a lot more reactionary if the capitalism "we" were born into worked better for us, and generational labels as a whole are largely a marketing thing or a distraction. I'm just saying that you could push someone down the right path when thon brings up "boomers".