Support your local restaurants. Don’t let these vampire platform companies enshitify your city’s food scene.
Or just order from local restaurants using GrubHub. Most mark up their menu prices to absorb the hit they take from working with GrubHub and similar services. Some will encourage you to order directly or through a different 3rd party by including a flier with the delivery order. But many others only offer delivery through 3rd parties like GrubHub.
I just call them, it's not like the phone company takes a cut when you order on the phone.
That's good for you. I prefer putting together my order with the menu on my phone, adding notes and having a moment to think about those notes, adding delivery instructions, tipping with the same credit card I pay with, tracking my order, having an order history I can view, and not bothering people who are busy running a restaurant and don't need to be talking to me on the phone since this has all been automated for a couple decades. And to be frank, many restaurant workers don't have the best English skills and may be in a loud environment, making phone calls more difficult.