I'm not saying the Church was benevolent, far from it, it's a cruel capricious institute that was responsible for the deaths of thousands. I'm just saying it's because of the Church there was no real "Dark" Age, science still progressed, slowly. As much of the previous knowledge of Classical antiquity was preserved. The Church founded further education, which allowed for advancements (albeit none as major as what would come) in medicine, and let's also not forget, this biggest advancements in science usually come through war. The Crusades were bad, yes, but as with all wars, progress came in the form of Arabic numerals to Europe, as well as interaction directly with Muslim ideas of medicine which had been out of contact for a couple centuries because of the Byzantine Empire in between. Those who had a curious mind were to continue to be curious no matter what, they were just lucky that the Church preserved enough of Roman civilisation to educate them and let them provide modest advancements, until the Renaissance (also only possible because of the Church).
Instead of wishing the Church did nothing in the collapse of the Roman Empire (which would be undoubtedly worse), you should wish they shared the knowledge they preserved.