your objection of his use of some of the words you object to is most unfair for 'poetry'

Maybe I did go over the top a bit. As it happens, I've written sonnets in the past - and large amounts of poetry in iambic pentameter - and I've always taken pains to get it right. It's actually not that hard, if you take a bit of care over it.

there are different kinds of sonnets

True - and your use of the difficult Petrarcan rhyme scheme would certainly earn you points, if only you'd brought it off a bit better. But none of them mess around with the metre the way you do. If it's a sonnet it'll go dum-DUM, dum-DUM, dum-DUM, dum-DUM, dum-DUM, with a very few variations.

But this is Mudcat Vs Walkaboutsverse all over - we can all criticise or challenge him as much as we like, it'll all be shrugged off or ignored, even at the cost of total inconsistency. I like the challenge and effect of saying things WITHIN those limits - but when I point out he's failed to do so, that doesn't matter because poetry, as with music, IS subjective.