I’ve not dug through it, not an I picking a side, but I figured I would share that a users votes are public
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Get a list of votes for any post, comment or user on Lemmy

…So… Someone looked through my vote history and decided they didn’t like the way I voted?
That’s my guess, but I have no info to prove it.
Have your tried appealing to the mods and admins?
No, I noticed a couple weeks ago, and didn’t really care. But I tried posting to an Elder Scrolls comm this morning and was reminded.
More likely they looked through your interactions with their communities and saw you didnt contribute and only downvoted.

If you look at my modlog and voting record, you will see a very similar story as yours. With the exact same ban messages regarding “systemic downvoting” months apart, but with “different” moderators.

Some people create communities with the explicit goal of creating an echo chamber for their opinions. These modlogs reflect much more upon them than the people they ban.