Pretty much yes. If you don't want to be doxed, then don't egg people on that think doxing is a fun hobby. No one is undoxable but if you have decent opsec going on why would you ask people to pick that apart?
It did take like nine months, and none of those usernames are used with anyone I interact with as part of my personal or work life. My name and face is still unknown.
Proper identiy protection has several rings.
Ring 0 is banking information and identifying codes like government ID and whatever is needed to access and manage financial information. That Ring has not been broken
Ring 1 is publically available information like pictures, full name, address, close contacts and place of work. That Ring has not been broken
Ring 2 is online personas and accounts that is shared with friends and online shopping and income sources, and has links to Ring 1 information. That Ring has not been broken.
Ring 3 is throwaway accounts where your reputation doesn't matter and only vague information is contained (city of residence, gender, likes and dislikes, etc) and has been carefully curated to not contain any details that can be used to determine more sensitive information. All you have done was link the throwaway accounts together.
Granted if you were a very good hacker or state actor there is probably some information you can find hidden in private server data that would provide key information, or if you could cross-reference a massive and omnipotent database of things like everyone who owns a pet and what's that pets breed, the address that everyone currently resides at, everyone's sexual preferences and fetishes, and so on. But such an omnipotent database doesn't exist, and the world would have bigger problems if such a hacker or state actor had such reach.