Do you Agree with our President using Executive Action to Help Address the Critical Issue of Gun Violence?

SPC Andrew Griffin Great question!
It's not that he is using executive action to achieve a goal that is the problem.
He says he is doing it because Congress will not, which is not a true statement. Congress has done what he asked multiple times and in return asked him to consider amendments to the legislation to fix errors. Instead of considering amendments he uses executive orders to rewrite the law. His administration's law. Think about that.
He has used executive orders to block legislative action and to out flank members of Congress.
He uses it at his own discretion and not in the interests of the country or the population as a whole.
How do we know this? Because, he uses it on issues he wants to put through but doesn't use it if it's not something he's personally interested in, saying he has no power to act.

This assumes there is a "critical issue with Gun Violence."

We must first look at two things.

1) Why are we segregating Violence based on the Tool? It's just Violence.
2) Is there a "critical issue with (Gun) Violence?

Let's address 2) first. ALL Violence, to include "gun" violence has been on the (steady) decline for the last 40 years. That being said, is this really a "critical" issue? As gun sales are increasing EXPONENTIALLY, and VIOLENCE is decreasing steadily, we must look at your premise as false.

So, why should the President use Executive Action, which is designed ONLY in absence of Law, or to Clarify existing Law to "solve a problem" which does not actually exist?

No. His measures will have no effect on gun violence but will distract from his foreign policy failures.