So you have read several times that this term is criticized as offensive, yet claim that in your perception the word is the opposite of offensive. What more would it take to get through to you?

> In my perception, it's the opposite: anything that is "retarded" is perfectly capable of being better designed/implemented or of making better choices, but instead actively chooses to do the worst possible thing for seemingly irrational reasons.

This is a such strange thing to double down on.

Not everyone is "rational" as you perceive them. That's the point. And it's not always an active choice. Some people are disabled. Some people think and act differently than you. You don't get to call them irrational any more than they get to call you intolerant.