The US has literally 0 third party representation at the federal level and 10 state senators all libertarian. Even Bernie isn’t technically a third party he just is no party. So to be clear, having no party is far far better in the US than representing a third party even in a local election.
The communication isn’t the problem. They communicated just fine. Increase taxes a little to send money to fight proxy wars overseas without drastically reducing any existing public saftey nets. Give money to companies saying they are seeking green alternatives as a way to reduce carbon emissions. That is the whole set of policies they have enacted.
Everything else they have to say is just that they won’t be awful. They won’t protect abortion, but they won’t get rid of it at least. They won’t increase the minimum wage, but they won’t try to bring back children in coal mines at least. They won’t help make it easier to form a union, but they are not going to actively break up existing ones. They won’t make it cheaper to own a house or decrease housing prices, but they will give everyone enough money they can get locked into that mortgage. They won’t pay for college, but at least they won’t defund public schools in favor of religious charter schools.
They didn’t lose by 2%, they lost by getting less than a third of America to vote for them. This was a crushing loss that shows they are out of touch with the needs of the American people. They won’t fix that by demonizing the voters. They have gone to the well of trying to get Americans to hate themselves for 16 years now and the well is dry.