Quite the opposite. The Church (mostly monasteries) in Northern Europe was the main source of progress in science and the progress was rapid. Mostly applied science though like agriculture, melioration, construction, metal forging, waterwheeel etc.

This book explains quite well how Western European civilization during Dark Ages was sucking all kinds of inventions and improving them slowly in order to adapt itself in hostile conditions of Northern Europe.

https://www.amazon.com/Cathedral-Forge-Waterwheel-Technology...