And yet even in 2018 there were examples of state-level polling in Senate, Congressional, Gubernatorial, and State Legislative races where Democrats underperformed what the state polls showed. It isn't about being miserable, it's about having realistic expectations that pollsters still have been struggling to capture the total Republican vote share and produce more accurate, state-level polling. You can both be realistic in your assessment of polling and committed to making sure Democrats get the wins that polls say they'll get, even if you are skeptical of said polling.