If it helps, you can try one of the several Nyaa proxies around.

using this site cuz nyaa just flat out doesnt work properly for me anymore :<

The only thing automated is torrents under 16GB.
Anything over might get processed if there's spare capacity to do so. Requests aren't fulfilled by popularity, and friction in the process is intentional.

I believe some people would make careless requests, if it were just pushing a button.  And we have jokers and trolls here too.

How to not make it easy for a user to make multiple new accounts?

I guess that's true yeah. Maybe a different idea:
Making the process of requesting a missed batch to be mirrored more streamlined?
Like a vote button that only works when signed in to an account (prevent bots), then after a vote threshold is met, automatically mirror?
Maybe still have different skip limits for the votes too so no ridiculous stuff is mirrored?

Thanks for reading and considering btw.

Thanks for the suggestion.

If what you say is true, the 2GB isn't so much the problem, but...
That's the part that hurts.

The option doesn't exist. Nyaa should have that capability though.