Neither resentful (he enjoyed his time in Cambridge and maintained contacts there for many years) nor failed (he took a four year "ordinary" degree and passed his finals well in the top 10 percent, 10th on the list out of 178). He just never went on to take up orders in clergy as his scientific career took of, and he found himself loaded down with scientific work, in the wake of The Beagle voyage.
The rest of your sneering screed is about equally accurate.
Don Vito Corleone advised a heroin dealer that the Corleone Family would not be financing, protecting or participating in the heroin trade with or without the heroin dealer (played by Al Lettieri). Nonetheless, Don Vito wished the heroin dealer well since the interests of that hero9in dealer and of the Corleone Family neither coincided nor clashed. So it is with those who are descended from humans through the grace of God and those who claim simian or apelike ancestry (and prove it by their claims and their "worship" of the false gods of "science"). Of course, like the heroin peddler who determined upon assassinating Don Vito (unsuccessfully), the simian descended are not satisfied to mind their own fantasies and business but seek to farm the earnings of those descended from humans to finance the distribution of their godless propaganda through the forced mechanism of gummint skewels which follow a regimen of ignorance as scholarship, godlessness as science and various socialist and materialist fantasies as "history."
However Darwin may have fared at Cambridge, Jesus Christ saved each and every member of the human race who will take Him up on the offer on His terms.
The Anglican church's temporary gain was "science's" permanent loss. Fortunately nothing important was harmed. If Darwin had determined that man was descended from Stilton Cheese it would have made no more difference. Even Darwin himself did not presume to have discovered anything useful, assuming falsely that he discovered anything at all.
Scientific discoveries (by definition part of the search for TRUTH) include such useful things as transistors (despite the looney bin imagination of inventor William Shockley on other matters), telescopes, microscopes, the speed of light, the effects of sunstorms on radio/TV transmissions, radio, TV, internal combustion engines, antibiotics, cellular therapies, chemotherapy, CAT Scan technology, photography, FAX technology, the curve ball, the knuckle ball, the slider, golf, bifocals, thermometers, odometers, tachometers, transmissions, carburetors..... and do not include pseudoscriptures of no conceivable utility like The Origin of Species and its silly pseudoreligious pretensions to replace Scripture with a pack of fantasies usefdul only to atheistic theologians of academe.
If Darwin did that well at Cambridge, it says more about Cambridge in an age of legacies than it says about Darwin. Imagine how badly he would have fared if the admissions of that era had been on merit.
AND BTW that's creed not screed although I plead guilty, guilty, guilty to sneering at what deserves to be sneered at.