I’ve had this happen to me. I suspect it’s one sad MRA type with a pile of accounts bringing the downvotes.
If true, I’d feel really sad for that person, in a go outside and touch grass sort of way.
Honestly, at this point I expect the large amount of downvotes for anything I post. I’ve had that happen to a post where I just said “Thanks” and nothing else. Its sad, and I’d wish the Lemmy admins would catch that sort of thing more often (understanding that they are volunteers, but still), as it doesn’t make my experience here on Lemmy any better than when I was on Reddit.