True Calvinism doesn't have anything to do with arrogance (although many debates over the theology end that way).
True Calvinism is about reassurance of the saints.
The one who believes what Calvin taught (and Paul and Augustine before him BTW) will walk in peace and assurance. And that's a wonderful thing.
The arrogance stems from the Brahminical attitude of "me and my kids are an upper caste Elite Elect (Covenant Theology)"
St. Augustine was overly influenced by his Manichaeanism. The Greek fathers were completely opposed to St. Augustine’s excessive rejection of free-will.
The Western Church suffered from an excessive reliance on St. Augustine rather than the broader view provided by the other Church fathers.