It's likely the IP itself, and not the residential proxy company. People abuse the IPs prior to you getting access to them, and is why the more expensive the residential proxy, the better chance of getting clean IPs. Spammers need cheap, quality proxies.. and is why they will go with a cheap residential provider.
Your best bet for social platforms is 4g proxies. 4g proxies have many benefits, most of which is that you will get a clean IP 99% of the time. More expensive, but you will have a better experience while performing actions.