They might have a different idea of what "better" means. And when you're starting with almost no infrastructure, no national identity (other than to resist foreign occupiers, not a point in our favor), and were as likely to know someone killed or oppressed by the foreign occupiers as by the Taliban or their kind it's not hard to see why there was little resistance.
There are several questions to be asked. 1. Was there ever an ideal time to do this (my answer would be no, but the closest time to ideal was 10 years ago after killing Bin Laden in a neighboring country)? 2. Would Republicans ever be happy with the way a Democratic President handled a withdrawal (2A. Would they be criticizing the exact same scenario and outcome if Trump were in the White House? no need to answer, clearly rhetorical)? 3. What could be changed to make the Afghanistan regime and military we installed and funded strong enough to prevent this happening? If such changes do exist, would we be willing to pay the cost to achieve them as we already dropped trillions into that war to no gain and hardly a token resistance?
I'm glad to see some more Republicans crawling out of the woodwork and feeling confident enough to comment on politics again, even if it's only because they think they might sense a weakness. But if you don't think white supremacists are a threat or a growing issue then you either haven't been paying attention to our history or the news or you're willfully ignoring the issue. Nonpartisan experts and intelligence organizations rate them as the greatest threat to our country for a reason. While they're by no means a majority it doesn't take many people to tear things down if they choose. We can't hope every attempt will fall as flat as 1/6, there will be more OKC bombing-level terrorist events as demographics shift and their voices and influence wane in legitimate politics.
People forget the Kurds, and I doubt many of the Republicans clutching their pearls at the "abandonment of the Afghani people" made a peep when Trump stabbed them in the back.
Well then clearly we should assume the best, given Trump's track record. If there's one guy known for careful planning, forethought, standing by allies, consistency, and toughness it's definitely Donald J. Trump. Right?