My list includes:
Being asleep at the switch for Benghazi, rise of ISIS, capture of Crimea, Syria, etc.
Then there is the loss of Afghanistan and Iraq and the associated loss of millions of $$$ of war equipment, as well as nuclear material.
Fast and furious
IRS scandal
NSA scandal
Failure to defend an ally — Israel
Affordable Care Act
VA scandal
Open borders scandal
Bergdahl trade for terrorists
Loss of Seal Team 6
Keystone pipeline blockade
Abandoning Missile Defense system for Europe
Suppression of speech of government employees, the press, the public
Appointments when Congress was NOT in recess
EPA and BLM overstepping their authority
I’m sure thee is more.
You left out how he scuttled NASA!
There are unanswered questions about many of those items. Although I believe the IRS abuse is connected to Obama, it has not been shown to be. Likewise I believe the border “crisis” is staged, but not proven to be Obama’s doing. What is his doing is the so called “Dreamer Act” which is not an act of Congress but an Executive decree that the law not be enforced. We still don’t know what happened with Seal Team 6.
All of the items you mention are legitimate and must be investigated.
Modifying PPACA and aiding the Taliban are both indisputably Obama’s criminal acts.