You can satisfy all of this, have an IP with an absolutely spotless reputation that you have personally controlled for years that has never sent spam, and still be arbitrarily shitlisted with zero recourse whatsoever.
IP addresses are really insignificant in spam detection because spammers can easily switch to a new IP address.
Like with Google's search algorithm, the spam detection algorithms are secret and evolve constantly. So I'm not claiming I know how the algorithm works, but it wouldn't surprise me at all if IP addresses aren't even used anymore in Google's spam detection.
So no, you are not 'shitlisted' as you called it. There are no lists, there are only algorithms.
