Well, actually, no. One of the first criteria for God to be an adequate explanation – in the logical sense of truly sufficient – is that God must be, if nothing else, self-sufficient - a quality that the universe, itself, and nothing found within it, can or does possess.
Now you may find that rather convenient for me or, even, insufficient for you, but it seems to me that anything contingent on something else, that cannot fully explain itself, is ruled out, by definition, from being a truly sufficient explanation for anything else, since it would, by definition, require some other explanation. So, to stop that endless buck-passing, I resort to aseity as a necessary or axiomatic characteristic for sufficiency.
This is quite logically consistent with other qualities such as omnipotence or omniscience that I hold are necessary to meet the PSR since being a completely self-sufficient, self-existent reality would mean that nothing could possibly make it “not exist.”
You see, this is what makes your view quite different from mine.
I don’t believe in the Easter Bunny or Santa Claus – not because I rule out their existence a priori, as you do, or because you claim they defy your belief system, but – because I don’t find that their existence is required to be explanatory of anything in reality.
If someone tells me Santa Claus doesn’t exist BECAUSE they don’t believe a jolly fat guy with a beard could possibly exist, I would laugh - because I AM a jolly fat guy with a beard. The reason I don’t believe in Santa Claus is because of what the Santa Claus hypothesis purports to explain – presents under the tree at Christmas. That has a perfectly plausible explanation without appeal to a magical fat guy. I don’t a priori rule out magical fat guys merely because I presume they don’t exist, as you do.
Now your problem is that you don’t have an adequate, non-question-begging explanation for the existence of the universe, while I do.
It would be like finding a 13.7 billion year old “present’ under your Christmas tree, one that encompasses all of time and physical reality, but you still can’t accept that it couldn’t have been one of your “go to” explanations - like your parents left it there - even though those explanations all miserably fail to account for the reality or nature of that “magical" present.
I have no problem believing in a Santa Claus, if such a belief could explain otherwise baffling events. You must resist such a move since you have “faith” that a more pedestrian explanation will surface “someday” even though everything that could be possible explanations in your field of view are precisely those things which, themselves, are in need of explanation.
So no, God is not something that MUST also be explained, since, conceptually speaking, using such a limited “being” as an explanation would be to resort to no explanation at all. I begin with the assumption that to be “explanatory,” in the sense required by the mysterious existence of an entire universe, God must have a unique nature - ipsum esse subsistens or aseity - as a logically necessary quality of anything that could possibly explain something like the coming into existence of the universe.
You may not like that and you may wish to characterize that as exactly like believing in Santa Claus, but, as I say, I have no compunction against believing in Santa Claus if I found that such a belief was required to be explanatory of something that could otherwise not be explained.
You are still left with explaining the – otherwise – unexplainable. Good luck with that.