I know part of the problem is that Trump is so horrible that...where do you start? But just pointing and saying "Trump is horrible" is not enough. Pick a few issues. Get on teevee every day. Talk about them.
I don't buy the idea that Democrats are just bad at "the game." I mean, I do, but it doesn't excuse the press who will get very mad if you tell them they are just pawns in that game. And then, very savvily, explain the game to you. But they are bad at it.