I DO support what Bernie stands for, and I voted for him in the primary! The majority of the party did not, however. In fact, they coalesced around Biden because moderates are more popular than progressives at this time.
Basically, if you want to uphold your morals and say "I won't stand for anything less than the exact policies I want", then fine. That's up to you and that's your decision. But don't turn around and get pissy when the Democrats don't then push for the policies that you didn't turn out to vote for en masse. They're under zero obligation to appeal to voters that can't be arsed to vote for them and let them know "Hey, we want the things you're doing." It's no different than how Republicans make ZERO effort to appeal to minority groups with their policies, because they're relying almost entirely on a white voter base. Why alienate the people who are voting for you in order to appeal to people who aren't?
We compromised on 15 dollars an hour. We want 23. We are trying.