Do you have a diagnosed cognitive condition? This absolute rejection of even the most basic and easy form of food preparation is concerning. Drinking that slop without a decent complementary diet is not healthy for your gut.
"The most basic and easy form of food preparation" is still food preparation; declaring that something is the simplest thing in its category does not actually make anything in that category bearable. Look through the thread, there are many people like this who are perhaps capable of cooking but who loathe it or otherwise can't make themselves do it. I for one am perfectly capable of cooking complex meals for twelve people, but good god the only reason I ever arrange to put food into my face just so that my meat continues to function is because I would die if I didn't. The time pressure on it is especially loathsome (if I don't eat in a certain window, I no longer have the energy it would take to force myself to eat); you can lie there and just feel the window of opportunity for this annoying task slipping away.
By the way, asking someone whether they're mentally unwell because they think differently from you is generally considered impolite.
I'd immediately buy pre-diced items and would have to find a recipe that could be made in less than 15 minutes, and even then that's pushing it.
My solution was soylent/equivalent. 8 years on I'm still drinking it.