We need to replace Trump with a rational human being who recognizes the value in the US being a part of a democratic, rules based global order, and so will rejoin important internal organizations. But we also need to reform our government so that a presidential administration can't unilaterally withdraw us from international organizations that we have committed to. Having big pendulum swings, whether in international or domestic policy, is destabilizing and inefficient, and it makes the US an unreliable global citizen. That is unacceptable. We have to do something about that. Yes, it will be politically difficult. We have to do it anyway. Let's grow a pair and get done what needs to get done. No more complaining, no more defeatism, no more declaring failure before we've even started, let's just roll up our sleeves and get it done.
Edit: there is another necessary change that we need to make, we need to eliminate American supremacism from our culture.
The concept of "American exceptionalism," which has been embraced by both parties for essentially my entire life, is really just a euphemism for American supremacy. And that's what MAGA is, a supremacist movement. The solution is humility, to recognize that we are not somehow innately superior to all other groups of people. That doesn't mean we can't be a great country, it just means we need to keep things in perspective. There are great things that we can teach the world but there are also great things that the rest of the world can teach us.