We need to take a long-term view of what’s happening. I have never thought that impeachment alone was going to solve all of the problems in the wake of the Trump presidency, anyway.
It is absolutely within the realm of possibility that there will be a censure of Trump, perhaps in conjunction with section 3 of the 14th Amendment (which would prevent him from running for office again). This would only require a few of the seven Republicans who voted to convict regarding impeachment to vote to censure. (This approach would only require a majority, not the 2/3 supermajority that impeachment does.) This strategy is actually politically possible and I am continually updating it as events evolve in The War After the Election [https://medium.com/illumination-curated/the-war-after-the-election-545de96aa4ca?sk=627c55d616d9296af3e398f1686493a4] .
There are other ways besides an impeachment conviction to hold Trump accountable which would also address the underlying problems. Heather Cox Richardson suggested in the interview you referenced recently that the Justice Department is considering using RICO charges to connect the dots of what happened on 1/6 (at 2:51 in the video). As these and other events evolve the Republican Party will continue to shrink and will need to figure out how to distance itself from Trump.
Hopefully this makes your glass half full again.