It is a different level of scale, mastodon has about 1 million users spread over a bunch of instances. Threads has over 200 million users on one instance. also due to the network nature of social media the amount of connections and messages sent through those connections can scale exponentially with the amount of users.
Yeah but this is a “needle in a haystack” problem that chatgpt and AI in general are actually very useful for, ie. Solutions that are hard to find but easy to verify. Issues like this are hard to find as it requires combing through your code , config files and documentation to find the problem, but once you find the solution it either works or it doesn’t.