Part of the problem with “refutations of Calvinism” is that said refutations usually focus on how mean it makes God look. While that is a problem with the doctrine of God, and unhistorical, too, that isn’t really a logical refutation.
Calvinism is a strong, powerful system. It withstands blows that would fell lesser systems (e.g, dispensationalism). However, it is susceptible to internal critiques that can function as potent defeaters. It’s better to deal with problems in Calvinist Christology than debate predestination with a Calvinist. They live for debating that point.
I am not an Amryauldian. However, there is a lot of audio distinguishing this system from Calvinism and why they reject Classic Calvinism. It might be worth your time for these people have stood within the Reformed tradition, and thus their critique, whether they realize it or not, is an internal critique.