Because you now did it to yourself.
When fully capable adults do stupid things, like voting for an man with as many very serious faults as Trump, I blame them for doing it. That Democrats were ineffective at convincing people (or inspiring them) not to do something stupid doesn’t make the thing any less stupid to do. Inspiration is not required to avoid being idiot.
When fully capable adults do stupid things, like campaigning to a voting base as grotesque as Trump’s, I blame them for doing it.
Democrats, or at least those in their establishment bubble either on TV, on podcasts, at the DNC, or on the congressional floor, will believe anything they want to that’ll pass on blame and hold to a superiority complex that they’re never wrong. Power corrupts and all that.
Inspiration is absolutely required when you outside of the representative Democracy have lost hope in the economy, society, or planet. Apathy is much more destructive than idiocy, even when the latter is in favor of fascism. Apathy is what lets fascism and idiocracy prosper. There needs to be a counterforce should we keep the alternative at bay.
Democrats did not take Trump’s potential to do the above seriously enough, either in his rhetoric to espouse fascism or cast mis- and disinformation. And now we have to deal with their failure.