I hope you’ll read this article. It spells out, in glaring detail, exactly why it is so difficult for Dems to win, and it has nothing to do with all the things you believe.
For a variety of reasons—some long-standing, some intentional, others newer or incidental—the political institutions that make up the field of U.S. politics are increasingly stacked in favor of one side: the Republican Party. @FiveThirtyEight explores: https://t.co/94FWRUAlPN
— ABC News (@ABC) May 2, 2021

Good read.
The Republican Party is in the process of burning itself to the ground.
The Trumpites will be systematically mangled and disassembled by the Establishment and will quit the Republican Party in a rage.
What happens then can’t be projected using historical data.