I dont think my failure to demonstrate objective existence of anything has the consequence of deciding whether or not something is real or objectively real does it.
It has the consequence that you have failed to demonstrate its reality, so it's just a baseless claim.
Secondly why is the unreality of God the default position?
For the same reasons that have been explained to you multiple times - its called the
burden of proof. The alternative is that anybody could make any unfalsifiable claim and it would be up to other people to disprove them, which is impossible if they are unfalsifiable, so we'd all be left having to believe endless, often mutually contradictory and fantastical, claims, which is a reasonable definition of being delusional.
What's more, since "God" refers to a whole host of different concepts, some of which are mutually exclusive, we'd have to do that even if you could argue "God" was a special case, which you've never managed to do.