If I am breaking someone's balls, or otherwise ridiculing them and their only retort is "fuck you," I am ecstatic. If that's your only comeback, I win, you lose. I feel the same way about OK Boomer.
You recongize boundaries. The people who do not have boundaries are the ones who take Ok Boomer personally like it is the N word. Nope it is not like the N word it is more of a fuck you.
Sometimes mookie you deserve a fuck you, and sometimes you deserve smirks of pride. The fact you are aware of subjective spaces, and sometimes respect those spaces, means you are worthy of ones attention and deeper relationships.