How did he not implode? Had he continued to run a clean campaign like he started off with, just promoting his ideals rather than flipping out at Planned Parenthood and AIDS activists, trying to get Frank thrown off his post at the convention, constantly tearing into Hillary when he didn't really need to because he had no mathematical chance at winning, etc. then he would have emerged from this process as someone with stature in the party or at least in the Senate. Now he's burned every bridge with basically everyone - in the party, in his own campaign, among many former supporters - and he's going to go back to the Senate and nobody will want to work with him. I mean, I get the appeal of sticking to your ideological guns until the end, but socialism isn't about lone wolfism it's about mass support and people power, and currently the closest thing in the US to a party that could achieve that is the Democratic Party.
He did a lot of good destigmatizing the word socialist, and that's why I've continued to support him this entire time, but it's become more and more frustrating. I'm still not happy with Hillary and I never will be, and I'll probably vote third party in the fall because I'm in a safe blue state anyway so I don't have to worry about Trump winning here, but Bernie should have learned at some point that if you're going to try to build leftism within a bourgeois democratic framework then have to be willing to work alongside these bourgeois democrats. Instead now we're just going to be the laughing stock, the Paulites, while the neoliberals continue to hold power without challenge, and we're going to have to go back to the drawing board. I just don't want "democratic socialism" to end up meaning "what that crazy Bernie Sanders supported" instead of being a viable alternative bloc within the party.