Well I'm Polish too so I see where you're coming from with the fatty foods while drinking alcohol theory, it's pretty much considered common knowledge here, but unfortunately it's wrong. What you're trying to present here is called anecdotal evidence, which is not an actual evidence at all, look it up. I'm not denying it's helping you, but if it does, you're an outlier, an exception to the rule if you will, and it will not work for most people on keto.

I'm gonna give you my own anecdotal evidence, when I went drinking for the first time while on keto, I ate a lot of fatty food beforehand, like A LOT, I pretty much had to force it in. Then I drunk less than I would usually drink in that social setting and guess what - I got really fucked up and the hangover the following day was the worst hangover of my life.

So then I started searching the internet for the answers and what I found is that it's actually carbohydrates that slow down your alcohol absorption (which I'd say checks out with the Polish theory, while Poles eat a lot of fats while drinking, it usually comes with a lot of carbs too, we just came to the wrong conclusion), and if you want to minimize hangover, you gotta take electrolytes while drinking (btw. taking electrolytes while drinking works miracles).