Since you wish to play the role of enlightened critic, here's some food for thought when practicing the art in the future:

Pointed criticism, if accurate, often gives the artist an inner sense of relief. The criticism that damages is that which disparages, dismisses, ridicules, or condemns.
--William Ernest Henley

The difference between stupidity and genius is that genius has its limits.
--Albert Einstein

Criticism is prejudice made plausible.
-- H. L. Mencken

"Criticism is a study by which men grow important and formidable at a very small expense. The power of invention has been conferred by nature upon few, and the labour of learning those sciences which by mere labour be obtained is too great to be willingly endured; but every man can exert such judgment as he has upon the works of others; and he whom nature has made weak, and idleness keeps ignorant, may yet support his vanity by the name of a critick." -- Samuel Johnson

It is not the critic who counts, not the man who points out how the strong man stumbled, or where the doer of deeds could have done better. The credit belongs to the man who is actually in the arena; whose face is marred by the dust and sweat and blood; who strives valiantly; who errs and comes short again and again...who knows the great enthusiasms, the great devotions and spends himself in a worthy course; who at the best knows in the end the triumph of high achievement, and who, at worst, if he fails, at least fails while daring greatly; so that his place shall never be with those cold and timid souls who know neither victory nor defeat. -- Theodore Roosevelt

AND ONE OF MY FAVORITES:

The critic's symbol should be the tumble-bug: he deposits his egg in somebody else's dung, otherwise he could not hatch it. -- Mark Twain