I thought the whole idea is to make entire communities migrate to Lemmy
Not entire communities. One. I'm saying let's find one subreddit (out of the 100k+ subreddits that exist) that could be interesting and let's focus our efforts on solving the problems of this one community.
I don't mind criticism, I do mind getting sidetracked with arguments and objections that are not related to the proposal. When you start arguing for something beyond the idea of finding one subreddit, it feels like a drag.
It failed in the sense that Reddit still not just got what it wanted, it was a test that showed that most people don't really care about the nature of social media and tech companies, as long as their precious content is still provided. It certainly emboldened to go ahead with their plans of IPO and on monetizing user data.
I'm not saying we should bash ourselves. Trying and failing is certainly better than subjugating to the status quo out of apathy. But Lemmy is stuck at 35k MAU, which Reddit is one of the "smaller" social networks and still counts 400 *million MAU. I wouldn't call a "massive victory" if we only managed to reach 0.01% of the userbase, and it's not even like the people here completely got rid of Reddit, a good number of them are still quite active there.