weeks? more like months. Yep, can't report them via SpamCop. I always report them via https://support.google.com/mail/contact/abuse?hl=en Not sure why they can't fix their crap.
I'd genuinely be interested to know from someone working at Google why Google can't / won't solve this, even for the narrow clearly-defined cases I see.
B) How much money does it cost Google to not fix a problem?
If A > B then, duh!