Is there a mistake in this vast rebus?

They say a picture is worth a thousand words; that may be a slight exaggeration in this case, but the words in this case are timeless. I present to you a puzzle which is quite simple (albeit large) and quite superficial (although its message is not). While its creation has cost me many an hour wasted that might have been better spent, it will doubtless yield its meaning almost at a glance to those familiar with its content.

Without further ado then, take some light relief from the toil of untangling difficult enigmas, and interpret if you will the following picture (full size here):

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Hint:

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Hint 2:

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Hint 3:

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<sub>This puzzle is not particularly clever, complex, or multilayered. It is what it claims to be – a giant rebus that encodes its content in a simple albeit quirky manner. Think heavy dependence on lighthearted, tangential (and far too punny) wordplay. Once you have interpreted the rebus, the solution will be complete. The puzzle is, I guess, somewhat a passion project – having consumed hours of time over the past few months, for a result that is neither pretty nor skillful, but really just a bit of fun.

Disclaimer: The entire image has been hand-drawn from scratch with a mouse in MS Paint (with heavy dependence on the curve tool) by someone with no artistic ability. Over the course of the months involved, some inconsistencies of tone and method have also crept in, for which I offer my apologies. While some components of the image are obscure, the quantity of components present should enable the more difficult ones to be deduced, and elucidate the order in which they should be examined. Also note that some artistic license has been taken for the sake of presentation, and some visual aspects of the image may be tangential to the solution.</sub>