Is this dental hygiene routine OK?

Too much Listerine. Seriously. All that alcohol and menthol will eventually just burn holes in your mouth. Limit rinsing with the Listerine 2-3 times DAILY, not with every routine. And you don't need to brush twice, either. Just rinse with water, brush, floss, then rinse with Listerine. That's all you need to do.