AITA For expecting my friend to pay me back for their entire meal?

I had a friend over one evening and we had a few drinks and decided to doordash some food. This friend picked a relatively expensive restaurant and ordered a lot of food. Their portion of the bill, not including a tip and extra fees was around $40. I paid for the doordash and they said they would Venmo me for their meal. They only ate part of the meal and put the rest in the fridge. We had a few more drinks and they ubered home, forgetting to grab the rest of their food. The next day they sent me $20 on Venmo. I reminded them it was $40 plus a tip, and they came back with “I only ate half of my food. I figured you could have the rest so that’s why I only paid for half of it.” I went off and they grudgingly and angrily sent the other $20, nothing for a tip and told me IATA and overreacted and now they won’t talk to me. Like, WTF. I am not going to eat their leftovers.