Bret Devereaux recently went into a lot of detail on this in his blog [0]. Short answer: some things stayed the same (lots of sub-communities didn't see much difference), other things distinctly got worse (lots of people died). The process was also different in different areas. In general, in Western Europe, a lot of regions went from an urban-oriented centralized economy to a more decentralized one, causing big problems for the cities that no longer had the administrative prowess to support themselves.
[0] https://acoup.blog/2022/01/14/collections-rome-decline-and-f...