This explanation was not related to that specific "meeting". And he never even acknowledged that the two couldn't see each other - even when people pressed him about it. So in his view, this was a successful meeting (as he would define it).
Wrong on all accounts.
1. The explanation is related. The very first thing he says as part of that tweet-thread (is that the right term?) is "Two players finding each other on a stream in the first day - that has blown my mind.". So from the very first tweet in the "thread", the subject is clearly defined to be about the "meeting".
2. He did implicitly acknowledge that there were issues with the "meeting" by offering the following explanation: "We added online features, and some Easter Eggs to create cool moments. We hope to see those happening... but too many of you are playing right now. More than we could have predicted."
3. By offering an explanation as to why the meeting had issues, it's safe to say that Murray does NOT believe the meeting was "successful".
Look, he's offered an explanation. It probably isn't satisfying people because it's not apologetic in tone. Rather it paints the situation in an almost triumphant light, which probably isn't appropriate.