I understand that Robinhood sells order flow and that you may get a worse fill because of it, but is the average Robinhood user getting 3 cents of slippage on their order of 1 share of Ford worse than a $10 round trip in order fees from a more premium broker on the same trade?

I think the order flow model is better for most retail traders. Obviously, if you're buying $20k in stock at a time, paying the fees will be better, but that's not your average Robinhood user.