I have never gotten a response to an SES spam report.
A quick search turns up 50 or so in my sent mail folder within the past year or two.
3 of the most recent 5 reports are all the same message content (likely the same sender, although possibly using different—maybe hacked—accounts).
By way of comparison, I've sent a similar volume of complaints to Twilio Sendgrid, received a response to every single complaint, and a random sampling of recent reports doesn't show any repeat message content.
Google doesn't even provide a way to report spam from Gmail users, which is ironic given the OP is complaining about Google's aggressive spam blocking. Spam from Gmail is comparable in volume to what I receive from SES and Sendgrid, and almost all of those messages are obvious phishing and 419 scams. (One would think one of the largest tech companies in the world would be able to implement basic filters to catch these, if they cared enough to do so.) Cf. spam from SES, which is mostly either cryptocurrency pump-and-dump, or semi-legit companies sending to spamtrap addresses that appear on publicly-indexed web pages, in WHOIS, etc. but which have been never used for real correspondence (and have obviously never opted in to any lists).