Even if it's some personal style thing, I don't perceive "Could you...?" as rude or anything.
If anything an exaggerated please could seem more insulting, as in "Could you please just do this simple thing ffs!?"
Of course, trying to accommodate everyone's unique perspective and behaviors would never scale, so instead we fabricate social norms that represent a sort of common denominator of human behavior. Part of these social norms are manners and polite behavior. These act as a sort of protocol for human interaction.
This all a long way of saying that even though you may think saying "please" is condescending or implies a favor, you are almost certainly in a vanishingly small minority and this will not serve you well socially.
I am trying to give you some insight into why you struggle with social interactions and often rub people the wrong way without intending to or even realizing it. My strong recommendation is you be polite even when you think you don't need to be.
Anecdotally, in my team which spans individuals from each continent except Africa and the poles, US english speakers are the least likely to use 'please', whereas our APAC (asia-pacific) contributors use it liberally.
If it's really something subjective I would say "This would be nicer if..." or "I think that could be changed to..." Instead of formulating some almost passive-aggressive request with "please".