I've just watched the press conference in question......there was no "rant" or "outburst" like some people are claiming. He is calmly explaining that he'll be leaving anyway and if the fans really want to help Chelsea FC then they should focus on the team, as he'll be gone anyway. Nothing wrong with that at all.
ofcorse it was a rant, how many times did he say he was leaving anyway also how many times did he say the fans are damaging the Club, you could see he was flustered by how many times he kept on repeating...