1. It will be circulating in the wages of a lot of people doing work on the campaign and it'll be making its way around. A few individual consultants have probably got very wealthy for doing a terrible job.
2. It didn't work. There was not enough enthusiasm for the election choices.
3. Rallies contain only the most enthusiastic individuals and only a small percentage of the total voting population. Trump is much better at the common touch than either Clinton or Harris - but Biden could get people on side. Trump rallies built his base, Harris' rallies fed an echo chamber.
4. Move towards economic betterment for all and stop talking about identity and playing identity games.
5. They missed white working class men, perhaps the largest voting block in the US after white working class women. Those men showed up for Trump, in part because they have been economically ignored by neoliberalism and made the grand villains of identity politics. They also brought their mothers, sisters, wives and daughters.
6. Economy underpins everything. Most other things can be resolved through voting at the state level. Many states had separate votes about abortion rights, meaning people could vote pro-abortion and still vote Trump.
Good questions. :o)