Yes, while res proxies and anti fp browsers do a very decent job, they cannot prevent everyone out there from being reckless, or not knowing some stuff.
I have personally made a profile on an anti detect browser emulating an android device and lol, you couldnt scroll pages. The anti fp product is great overall, will not name shame them here, but just like with using chatgtp to spit out code, it helps to understand how youd structure the code yourself, same applies for anti FP.
Make sure your broswer, vpn or proxy does not leak, I have seen some funny things with them, I have seen them leaking IPs, massive location mismatches etc.
OP also didnt say which platform found him out, for example, if you want to have some fun with gmail accounts and use Chrome to set them up, you have a formidable opponent in Google. Same goes for Google reviews, of course.
If you want to do things on FB, dont forget who owns WA and IG.
If you want to do things on Trustpilot, then its vastly easier, but not braindead.
I took my time to deliberately see when TP does what, including interactions with their teams, its very interesting.
You want to figure out what triggers an algorithmic flag and what triggers some human review, I did that by simply doing the most stupid approach, yes to all cookies, leaking IPs, I mean, testing this on a competitors page is the best training ground you could wish for;-)