Not sure how you draw that conclusion, Trump still won a second term and much of it was based on his getting arrested as well as capitalizing on his impeachment. I'm all for fighting but that's not what Democrats do, they start proceedings and then hedge, then Trump stomps their faces into the dirt and they go home crying with their tails between their legs.
The Democratic party as it stand is weak and needs real leadership, not people who get laughed off the stage. I'm happy to agree to disagree here but mark my words, if this impeachment gets off the ground it will have zero impact in the end and Trump will just come out stronger.