Is the Christian God really all good, all powerful and present everywhere, and the creator of everything?

God indeed has free will. However, neither God nor man is able to act against themselves. If a man does evil which he would prefer not to do, it still must be a part of who he is.

”We are what we repeatedly do. Excellence is not an act, but a habit.” --Aristotle

By definition, gods are omniscient, omnipotent and ubiquitous.

Our Ability to accurately describe God is flawed because we cannot fully comprehend God. Because He is God and He is much bigger than us

We have the bible which expresses some of his nature that we can accept, even if we cannot understand. Things like Trinity, Omniscience, Omnipresence et all, are well beyond our ability fully grasp

As darkness is the absence of light,

Evil is the absence of God's Goodness. Those who reject God dwell in the dark

God created the POTENTIAL for evil, but all evil is fomented in the heart of man

As for when God judges us, it is righteous and true, and while it can be very very harsh, it is never undeserved, and it is never evil

YES HE IS PERFECT AND HE MADE THE UNIVERSE AND ALL LIFE!!

There's no proof of that.