In an electoral system that doesn't take the popular vote into consideration? Yes. Democrats are now pretending that they lost "by chance", but their campaign (like the Republicans') is engineered and fine-tuned/optimized to get the swing states, not to optimize by how much they will win in traditionally blue states.

The worst election result is losing the house, senate, and presidency all at once. Look at who has power, not the votes.

No, the worst result was losing the presidency, house, senate, and 3+ Supreme Court seats to Donald Trump.

When your opponent is Donald Trump: Yes.

Oh you want to go with popular votes? Then Bernie Sanders should have been your candidate by a big margin but was prevented by the DNC's superdelegate system.

Congratulations for winning a game that wasn't being played.