I think Democrats who are savvy will realize that poor-mouthing the economy will not be a viable strategy for 2020, and will focus on other issues, such as universal healthcare, education, green initiatives, affordable housing, walkable cities, honesty and transparency of elected officials, campaign finance reform, universal access to voting stations, preservation of wilderness and heritage sites, etc. There are lots of positive ideas to talk about.
Patriotism can mean nurturing the welfare and health and environment of every citizen. It can mean not trashing every idea that threatens status quo oligarchy, and not freaking out at the idea of collective endeavors that aren't solely about profit.