> i find in general a lot of ukrainians here have some problems with this or find it unnatural. instead of "ja nie rozumiem" you can just say "nie rozumiem" and it's more natural. it works for the other forms as well. this is mostly due to the recent (around the break of the century) forced modernisation of the language. used to be it was the norm in ukrainian as well. and the majority of those online are obviously on the younger side thus were likely just recently born back then at most.
Ukraine