Not only the fees, but also just a completely substandard final product. Every time I have used one of these services (pretty much only when I get a promo code) it arrives late and cold. I would be furious if I spent an extra $5-10 on my meal for that to happen.

On a side note, I've noticed that most restaurants around me will add $3-4 per dish when using Uber Eats vs. just calling them directly.