Generations. It will be a long time before anyone in the world trusts America, and rightfully so. Even if Felon 47 goes away in four years... who's to say we won't "elect" a hand-picked successor? America MUST do away with the electoral college.
1. Getting rid of the EC would not have resulted in a Kamala victory. Over the long-term, of course, the EC distorts our presidential politics to a great degree. Issues that would be salient in an actual competitive environment just get ignored now. Why has climate change completely fallen off the radar (except for Trump taxing an axe to clean energy programs)? Could it be that the areas most affected by it have little voice in Congress and no voice in presidential elections? Florida, Alabama, Mississippi -- these are the states that stand to suffer the most (or at least suffer a lot). Meanwhile, the swing states in the rust belt are not the ones as affected by climate change -- or to put it differently, they don't understand themselves to be affected by climate change.
But I don't think getting rid of the EC is going to solve the problem you're discussing. There would have to be much more. We need a new constitution. Almost none of our current constitution is actually working. Well, "almost none" is an exaggeration but in so many areas the constitution is just not suited for the world in which we actually live. It is broken in many ways. Getting rid of the EC is but a small part of that.
2. On the other hand, I think you might be overestimating the trust issues. I thought for sure, after 2008, that there would be no appetite for just trusting the investment banks that had tanked the world economy. A decade later, and the financial crisis was mostly forgotten in politics, and Dodd Frank keeps getting weakened by the GOP (courts and presidents).
People are pretty good at forgetting or downplaying the past when doing so creates new opportunities. I've seen articles talking about how this is an evolutionary adaption on the part of humanity -- that if you think back to 10K years ago, 20K years ago, whatever is the proper evolutionary time frame, you can see why long memories aren't helpful. Sure, the chief's son didn't fight with bravery the last invasion; but we're facing a new invasion so everyone needs to get along. If you failed to kill the elephant in the previous hunt, forget about it -- do better next time, etc.
But in a world where fraud exists (remember: fraud did not exist until there was property, and even then property needed to be freely transferable, and even then there had to be rules about it, etc.), and thus fraudsters exist, I'm not sure that adaptation is helpful.
3. Anyway, if we act like friends, they will take us back as friends. They might not have the same degree of trust, but that's arguably good. Not in a Trump "they are ripping us off" type of way. More like the world will do better, I think, with Europe as a power that rivals the US and China, and thus creates a multi-polar world.
I also think, at the same time, we could ease that re-friending process along by making fundamental changes to our constitutional system. Not just to protect our alliances, of course. To save the Republic, and to let us prosper in a world where the right-wing seems intent on taking us back to the 1950s, 1850s, or 1790s.