First off, no matter how many times you hear it or read it, he's far from the worst President in history. Just looking at sheer metrics (number of jobs created, Dow Jones, GDP, Deficit, etc.), he rates as one of the best.
You may not agree with his policies, but what he has been able to accomplish against an obstructionist political party has worked and made things better - even Obamacare, while far from the perfect solution and with areas that can be fixed, is a damn sight better than the mess we had before. It can be easily be corrected and turned into something better if the Republicans would stop kowtowing to the Insurance companies and Big Business and start thinking about the people who put them there.
Secondly, he is a graduate of Harvard Law School and a Constitutional scholar so I bet he knows what he can and can not do. There are problems that need to be fixed...he inherited a lot of then from one of the worst Presidents in modern history and more were thrust upon him due to the inaction of our Legislative Branch, but he does have the ability, within limits, to take matters into his own hand and correct them. If you look at the sheer number of Presidential Orders, Obama by far ranks toward the bottom. He has tried and tried again to work within the system, but when you have a political party that has abdicated its responsibility to govern and made its sole activity for the past six plus years to stopping anything and everything the President does, even if those actions are agreeable to their own ideology and even to the majority of the citizens, then the President has no choice to but to do what he can within the limits of his powers to govern.
The sheer amount of disrespect that has been shown President Obama just proves how little the Republican Party cares about governing. It is absolutely shameful to look at the number of appointments that still, after over six years in office, are just sitting there because the Republican Party has chosen to become the Do Nothing Party and act like spoiled brats instead of being adults and working with the President and the Democratic Party. If they had taken the time to do what they were supposed to do -- compromise, listen to the majority, and really govern -- we would all be a lot better off.
And don't say that the Democrats haven't compromised. Obamacare has over fifty amendments to it, the majority either co-authored or solely authored by Republicans and it had more hearings in Congress than any other bill in history...it's not the Democrats fault that the Republicans acted like cry babies and decided not to attend the hearings -- go look and the Congressional Record for that time and see for yourself about both the Amendments and the Hearings.
Now, I'll be the first to say that I do not agree with everything the President has done. While our standing in the world is far better than it was under Bush, our drone strike policy is worse and there are areas of both foreign and domestic policy that could of been handled better. As I said above, Obamacare is far from perfect and it's still a massive giveaway to the Insurance Companies, but instead of repealing something that is far better than what we had before, if the Republican Party wanted to prove that they are not the obstructionists that they really are, they would come up with ideas to improve the law and work with the President to fix it instead of wasting months of time and millions of dollars to attempt to repeal a law that everyone knows the President would not sign.
I mean really, do any of you even remotely think that the President would sign a law that would repeal one of his signature accomplishments???
Look, I'd do the same thing the President said....if you wanna sue, go ahead. But I wouldn't be so fast to do so because there is a lot of stuff that I bet the Republicans would rather not see the light of day, lest they be proven without a shadow of doubt to be the root cause of a lot of the issues we're dealing with now.