Finish shares root of around 200 words with Hungarian, it's just the languages diverged and got influenced by their respective regions. For starters, both languages use different letters for the same sounds. Hell, Hungarian uses written form of sz for the regular s sound, and written form of s for sh sound. The long ő, in the end of a Hungarian word, has previously been a diphtong öü or eü and even more previously ev. Finnish e/ä is written as Hungarian under one letter of e.

And here are some examples:

Hung. kéz (hand) = Finn. käsi, Hung. vér (blood) = Finn. veri, Hung. méz (honey) = Finn. mesi, Hung. szarv (horn) = Finn. sarvi, Hung. vaj (butter) = Finn. voi, Hung. eleven (alive) = Finn. elävä, Hung. menni (to go) = Finn. mennä, Hung. reped (to be torn) = Finn. repeää.

Then you have switches from h to k, as in Hung. hal (fish) = Finn. kala

Then you have switches from f to p, as in fej (head) = Finn. pää, Hung. fészek (nest) = Finn. pesä

Or, the letter n in Finnish is often replaced by ny in Hungarian, as in Finn. niellä (swallow) = Hung. nyelni, Finn. miniä (daughter-in-law) = Hung. meny

Hungarian and Finnish diverged 4500 years ago, and they represent the opposite spectrum of the Ugro-Finn language group. There are 9 languages in the same language group, and the middle parts of it have more in common with both languages than Hungarian with Finnish.

From GP:

> Finnish is hard just because it's too different from our Indo-European languages mental model.

I'd imagine having this experience sure helps. Lots of people struggle to give up relying on mental translations to/from thoughts in their first languages.