The problem with trying to tell people “the more you hurry me, the longer this is going to take” is that an outside observer has no way to tell the difference between “I take any request to do something as a personal challenge to do the opposite out of spite, because I consider any expectation to accommodate your needs as a personal insult and beneath me uwu” and “the more pressure you put on me, the more stressed I am going to be, and the more anxious I am the more mistakes I will make, and I will have to go even slower in order to avoid them or keep trying to get it right over and over again so the only thing that makes the difference between us getting there in time or us both being late because I’m sitting on the floor crying is 100% your choice to either keep doing that or stop doing that.”