First of all: He doesn't believe he is more clever than he is. He is very much open on his own shortcomings. In particular in regards to directing - where he said the more cerebral directing style of TWOK (which was often praised) was not a concious choice, but rather because that's the only way he knows to do. He's strengths are more as a writer - and even there, regarding certain story aspecst, he is very critical of his own work (see:TUC), while still being proud of what he achieved at the time. His glorification as "almost flawless" comes mostly from the fans - and they're right: He IS the most clever guy to handle Trek movies so far.
And second: With your opinion of TVH and TUC being "the least-favourite" TOS movies, you're pretty alone. Now - there's nothing wrong with that! But mind you, these movies are very well liked among the fandom, and the general concensus is that they are far superiour to most TNG movies (except mabye FC) and the Kelvin movies (Except maybe ST09).
Remember the general "odd movies good/even movies bad" rule? He is singlehandedly the constant part of the "even"-movies. That you personally don't really like his movies is well and fine, and nothing to be ashamed on. But it's just that, a personal opinion, and a minority one at that. In MY personal opinion, both the TNG and the Kelvin movies started out from a strong place (FC & ST09), but then quickly disappointed expectations, and are the reason why Star Trek movies nowadays are generally looked down upon, and why the concensus in the last years seems to be that "it's better on tv". Wheras the TOS movie era - despite the one and other weak movie - as a whole still holds up as probably the best movie era of the franchise. And Meyer is the one individual most responsible for that.