I've answered that question.
No, you have not.
If the universe has parts it is contingent
Since we can ask why those parts and why that arrangement.
Just like we could ask that of your composite God. Leaving that aside for the moment, you appear to have made an arbitrary choice to label anything with parts 'contingent'.
You cannot be contingent on yourself. That is just misuse and misunderstanding.
Why not? I mean
logically, not just resorting to a dictionary definition of 'contingent' that was just a word
you've chosen to use. Something has parts,
why does that automatically mean that it depends on anything else?
Where is the logic that goes from 'has parts' to 'depends on something else'?
If you therefore exist independently you are a necessary entity.
I really couldn't care less about labels, but it would help if you could at least be consistent about them. Is a 'necessary entity' just something with no external dependency (brute fact) or does it need to cause a contradiction if it didn't exist or was different (logically incoherent)?
Nothing observed so far is a Necessary entity......and there's the end to it.
Why can't the universe 'exist independently'? Nothing you've said answers that question. And that's before we get to your shameless double standard with respect to your three-part God.