Trump would have to screw up far more than he has so far to cause amendments to even be seriously considered, let alone passed.
You speak the unfortunate truth. Our system of government is stuck and paralyzed due to those from the past. The political system has evolved to such a point where the government is unable to respond. I think we are in desperate need of revamping our system of government. Personally, I think we need to adopt a parliamentary system with haste. That doesn't mean we remove the checks and balances provided through an independent judiciary as well as maintaining a bicameral legislature. The problem is that there is too much checks and balances. A parliamentary system would ensure oversight, not to mention never allowing someone with the temperament of Donald Trump to ascend to the nation's highest elected office.