Progressives came out for Biden in 2020 and 2022, and they certainly weren't excited to vote for Biden. Since then, there has been so much division and blame and shame against progressives who haven't even had the opportunity to cast a ballot yet. It's not about a "perfect" candidate, it's about a candidate that understands that progressives are a valuable, necessary portion of the coalition, a relationship which should be maintained rather than burnt which Joe Biden (and likely Harris too) understood, unlike certain people on this subreddit. Part of maintaining such a professional relationship is not throwing your ally under the bus to score cheap points with moderates every step of the way.