The POTUS has too much power and SCOTUS just made it worse. Even so, the POTUS doesn't have the ability to simply fix things in 4 or 8 years.
The POTUS is measured by the things that happen while they are in office. The economy (including inflation) and immigration are two things that are driven by complex circumstances that don't change much because of one person sitting in the WH. Yet, they are also two huge measuring sticks for a POTUS.
The withdrawal from Afgan, for example. It was going to be fraught with problems. A logistical nightmare with any enemy that smelled blood. Does anyone really think it would have been much different under a another POTUS? Under Trump?
The President must be a leader - not a cult leader, but someone that has the respect of the many, many men and women that are responsible for actually doing things in our government. The House, Senate, Cabinet, WH staff, the Military, etc. and the thousands of people that support them. Having a couple of dozen people that worked for POTUS write books disparaging him/her is a pretty clear sign you don't have a leader in place.
We need a serious person that listens to others before making a decision. Not someone that just does everything from his/her gut.
I don't think I need to list all the reasons again - we all know them. Trump has disqualified himself as a candidate for POTUS.
So, we only have one to vote for. I hope she is up to the task.