Engine misfiring and flooding and will not run at all?

More than likely you have leaking injectors. When the checked the fuel pressure what was the actual PSI?

If you don't know, can we re-run the check and find out when you turn the key on how long the fuel pressure holds.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

I suspect it will build the proper pressure but then leak down quickly and then level out. This points a leaking injector.

Then we need to pull the plugs and find out what they look like and see if they show signs of excess fuel.

I suspect they will which at that point we need to replace the injectors.

https://www.2carpros.com/articles/how-to-replace-a-fuel-injector

Please see below for the detail on what the plugs look like and let us know what you find with this.

Thanks