As per this meta question [0], the one you've linked to doesn't appear worthy of downvotes. However, when I was active on the site, it appeared that (some) users active in a tag tend to downvote questions when they didn't have an answer to it.

That said, the reputation model also encourages low quality answers [1].

Overall, I found the site to be somewhat toxic and stopped visiting it several years back.

[0] https://meta.stackoverflow.com/questions/252677/when-is-it-j...

[1] https://meta.stackexchange.com/questions/9731/fastest-gun-in...