I present: blunt dutch responses

"Congratulations"

"Okay, but it isn't always about you, is it?"

• Very sarcastically * "wooooow that's amazing!" You're kidding!"

What you can also do, which doesn't escalate the situation as much but what would make you always stand above the other person is just asking why they say that and how that hurts you. Something like "I notice you always talk over me when I try to say something, and it makes me feel a bit shitty. Why do you do that?/do you notice you are doing that?"

This way people instantly feel bad and it's still possible to talk about it in a normal tone.