I don't disagree but I don't believe there was any way Democrats would have kept power in 2024. They were unable to sell any positive news about the economy (DJT does not seem to have learned this lesson and is doing same stupid thing as Dems did in 2024). The no real message on the economy was real but economy was doing great in post-COVID world especially compared to the rest of the world and there wasn't a reputable financial outlet that did not agree with this (Economist, FT, WSJ, Bloomberg...).
While I wholeheartedly agree with everything you said I do not believe there was a way for Democrats to beat DJT. His machine was just too good and no matter the candidate and no matter the message I don't believe it would have mattered.