Yeah, that's a nightmare and a half and I can see why you did that.
Currently I've tried repackaging the nuget but it brings about other errors, where it restores properly but later on in compile I get build errors. Right now I'm using the legacy version/older version of the nuget URL instead of the current v3 one until they get off of that package and I can remove it from my feed. It follows the format: https://url.domain/nuget/feedName/ instead of https://url.domain/nuget/feedName/v3/index.json .