Saying Trump is hurting the US credibility may be fair. As to define if his actions are more damaging to the US than his predecessors, this is not something that can be answered objectively, though the US reputation was already damaged way beyond repair before he even got elected.
They way he treats relations between nations is his way of doing things, and his unique approach. The more conventional ones have been tried by, again, his predecessors, and have not achieved any significant nor positive results. Up until the Trump administration got into office, the US were still waging two wars in Afghanistan, none of them being carried out efficiently and successfully because of their different approaches. Which are different now, since the US will be giving up on the nation-building endeavor to focus on anti-terror and counter-insurrection operations.
As for him having him having 0 patience, needing to have everything simplified as if explained to a toddler, etc... these are gratuitous attacks on character assassination that have little value and relevance. Trump bashing is fun, Orange man bad, we know. He is ridiculous, his voice is obnoxious, his air cut is ridiculous, his tan makes him look live a cheeto, he has small hands, and the such... but it does not achieve anything, nor does it really represent reality either.
Surely the way things are being carried may not be the prime and best example of "how to 101" in term of dealing with complex geostrategical situations. But it is still a better alternative than all the things that got presented by all the hawks either in his administrations or among the ranks of his opponents. That being said there is no proper way either. Academics are still trying to figure out the proper way to fight previous wars, the way they should have been waged or if they should have been waged to begin with.
Blaming Trump for all the bad things happening everywhere is, at best, deeply dishonnest and, possibly, out of touch with reality.
And here I am, defending Trump again...