It's easy to call them "godlike" since they were all quite powerful in comparison to humans.
But every one of them I can recall in TOS had very real weaknesses (other than perhaps the Organians) whether they were using artificial power sources or purely psychological in nature. So how godlike were they really? Even later on, Q seemed to have things that he couldn't or wouldn't do, bluster aside.
Also as others have noted, these sorts of beings were still around in TNG, DS9 and Voyager. So the idea that TOS is somehow skewed towards them isn't really true.