Democrats are actually lowering in favorability. Neither the DNC nor GOP is more favorable than unfavorable, while more people are paying attention politically. The apathy is directed towards the system overall, as people do not feel their votes get them much, if anything. What is surging in the electoral realm is support for the DSA, which signifies that, if nothing else, people want an actual change.
Now, reformism cannot actually establish socialism, so the DSA is still a dead-end. But what the DSA does highlight is the fact that establishment dems are wrong in claiming they need to "appeal to the moderate." This has always been a lie told to protect deliberate inaction. The DNC isn't a smol bean progressive party but a complicit party in US imperialism.