Maybe demonising major fraction of voters is not most effective tactic. Maybe you need to show that you actually did something for people in past term. Maybe you need to show that things that matter for many will get better. Say living conditions or cost of living.

I've been voting in the US since the 1990's. We've never had a presidential candidate that won and actually delivered on their promises, all of which have generally hovered around the idea that "things will be better this time." What makes you think this one will be any different?

Can't tell if you're criticizing the Democrats, or the Republicans.

They could learn more from Bernie.

Running a primary is like checking in code to the build. You learn a lot of things you cant anticipate, without engaging with the real world.

For elections this includes all the things that people think about a candidate that they don’t feel comfortable saying out loud, or even operate subconsciously.

A candidate without a primary is extremely risky.

I don't see that anything went wrong.

From what I saw on some Twitter videos ...

People claiming economy was better under Trump's first presidency then under Biden / Kamela's recent presidency. E.g. people mentioning super high inflation.

There were other arguments, but it seems to me this is the major one.