Ultimately this is a question as to whether you are a party person who follows the party of your choosing's candidates no matter what, or if you are an actual liberal with the ability to think past your nose and decide what is right for your country according to your values.
I'm a Bernie supporter and the DNC's failure to pick him as the nominee led not only to a Trump presidency but also has completely torn up the Democratic Party. Ultimately I'm not too worried about it because it was time to break the two party system anyway, and although many people are saying that Clinton was the first Neocon President elect for the Democrats in a long time, this is not the case. Obama furthered Bush' administration a T and for every liberal social policy he passed, he passed things like indefinite detention. No one did anything because democrats felt "secure" with their gay marriage and health care, which was really health care plan that had been proposed by Republicans and not the Single Pay system we all deserve. Furthermore, even before Obama, we saw in the Bill Clinton administration the most obvious abuse of power for a democrat when he invented mandatory sentencing for non violent drug related offenses, which he ONLY came out and said was a mistake years later to increase the chances of his wife winning presidency. Bill was not a true democrat and the party has not seen a true liberal for a long time.
Problem is in this country, if you become too liberal and threaten the corporate status quo and the way things are, you are going to get assassinated. JFK, MLK Jr, all victims of the government's wrath to name a few.
So yeah, of course I am pissed, but I think the problem was to expect anything better from the DNC when we have a history of our democratic politicians being bought out by corporations.
Had Bernie won, he would have been assassinated, I promise you. There are reasons why Bernie didn't fight the DNC's decision- he and his family were under extreme pressure and he ultimately decided he could do a lot better being a leader in the senate and leading from social media than risking his life by really going head to head with the government. It's sad that this is the country we live in, but ultimately, the cross we have to bear.