I'm going to ask a professional redittor to get off of their high horse.
Why do you feel a need to say that to the person?
I don't like the way they speak to other people.
It seems you think the person may have a condescending way of speaking to people. It's wrong to talk down to people and make them feel less than. Pointing out the way the person acts might help them correct their behavior.
I have nothing else to say to you. I'm done talking to you.
Okay, that's a bit abrupt? I feel like it's a little bit rude you ending things like that and I did not appreciate that. It's ok if you don't want my advice but you can be more polite about that.