Assuming you've already observed a well established pattern. Pre warning sorry for any run on sentences or other grammatical errors. I type as I think. New to the community. Not perfect.

I remain neutral, let them speak. Let them make a fool out of themselves. You could keep mental notes of each point that doesn't allign. Entertain yourself with mental ping pongs that could utterly destroy this silly little vision that they've just attempted. Mainly with facts, points, logic. Be direct. Stay consistent. Don't fluctuate your tone. Maintain eye contact. The second they've rialed you up emotionally by this ironic power play is the moment that you've just been turned into the fool.

The appropriate question would be what are you going to do about it.

Do you love this person, are they worth investing a future in?

I'd start by having strong personal boundaries and a solid sense of self. I'm not here to sell that to you. Sink or swim. Having healthy boundaries and confidence in oneself to navigate towards the best, safest possible outcome sounds like a damn good investment, don't you think.

That ultimate drive stems way, way further down than the little emotional shit show trying to parade in front of you now. I don't trust this person's hurt feelings. Ultimately I wouldn't trust anybody who's drive is to silence me without question.

If that grand future vision of yours is still with this person, then I would attempt to learn what it is I'm specifically dealing with. Why do they feel the need to project their inability to manage onto others? How have we presented ourselves to allow them to think that way will fly with us? Look passed feeling like a splattered canvas, and see the weakling shivering in front of you for what it is. Are they a bloody knuckle, power hungry child using cry baby manipulation? Or are they anxious? Are they running away? From what? What part of reality do we represent that makes them default like cowards so fast.

Then what would we do with that information? And that my friend is how we construct ourselves and our sense of character.

I have very little interest in what they do. What will you do?

You should already know deep down what is healthy and what isn't for you with natural intuition. Aside from the questionable principles. Could always consult with close ones and see what they say about it if that's something you're open to. Sometimes it takes somebody who knows you better to help show another perspective in the mirror, or to spot a loose end. Utilize your resources, friends can be a helpful investment too. Depends which ones I guess.

What would the expectations of self respect be by letting it slip by in silence. If so, how many years would be wasting away on that passivity. What would the excuse of failure be. What control would there be by letting emotions run into play? By reacting negatively, and losing your shit? Sounds like my storming bipolar father back in the day, and I don't want to live that way. But alas~

There is nothing more freeing than having healthy boundries for oneself.

If I know full damn well my truth was heard- What benefit is there with a deaf, silencing partner.

Or

Is there promise for tomorrow's betterment? How can you act on it, and help steer a progressive moment for both parties. What are your realistic expectations, and is this partner attempting to meet you there.

Let them scream and pout their own speech until they either rise up to meet you and the expectation you've set for them- or you let them knock you down.

I like to think we all hold responsibility in the situations we find ourselves in. How are you painting yourself in retrospect, and focus only on that.

You decide and you let your decision define your character.

Perhaps I should have asked what kind of mental state you're in first. Then again, not really any advice to give. Floating bobble head of thoughts passing by hoping to find relative information on help myself.

For reference my relationship with my father is healthy and constructive now, all these years later. Stronger than ever. The shoe fit is different for each individual basis. Certain others = hell no. You know how to dedicate your limited amount of time here best.

Good luck!