It’s not so much that this is a fight that can’t be won, but rather this isn’t the way to go about doing it, and the real impact on combating this can only be done by Twitch.
That’s just it though, multi-channel bans often rarely keep channels safer at all and can even lead to a false sense of security by building systems that actually have very little impact when bot networks have so many accounts that a spammer in one channel is unlikely to be the same one that spams on one of the other channels you moderate for.
I don’t believe there should be a need for an auto-report, or an API endpoint for reporting, because for safety reasons all reports should be manually handled by both the one reporting and the one reviewing the report.
Twitch used to provide a firehose to a select few 3rd party developers which did help in the tracking and reporting of the tens/hundreds of thousands of bots but unfortunately they’ve deprecated that now, and unofficial firehoses aren’t as reliable, so the best option for now is to hope Twitch themselves handle the banning of these sort of accounts themselves, and as channel moderators/broadcasters we should make the best use of automod, blocked terms, and individually banning accounts on channels as and when there’s an issue rather than trying to mass ban across multiple channels to often little effect.