Dumb drivers and a terrible tipping system!

Why would you want to tip BEFORE you even meet the driver or get your food delivered? Yesterday, I literally told the driver to leave the food by the door in the same text where I gave him a security code for my estate's gate. Guess what he does? He knocks, loudly. He does this, and then some contractors working on the other side of my house who do not know any better interrupt a business meeting to tell me that the food that should have been left beside the door (again, we live in an estate AND have visible cameras). I had to get it, and then I could not take back the 20% tip that I gave the driver even though he deserved it for his ignorance. How are you so dumb that you scan a short message for a code?? They did not even read it. I literally just said "please leave the food by my front door." in he message.