Not really sure how winning the primaries easily by double digits is getting "thrashed" but okay...
Well, when you consider that Bernie started off with, what, 6% support when he announced his candidacy?
He has now won, I believe, 20 primaries and caucuses, in fact, upsetting Hillary in places where she should have won.
A very impressive showing for an insurgent, at the time not well funded, campaign, squaring off against the Democratic establishment, and against the establishment candidate, who has been campaigning for President for the past 8 years, and has had tremendous financial resources to draw on for the campaign.
Not a bad showing for a 72 year old some time Independent some time Democrat socialist, who is likely to win some more states before this primary is over.