Vitek: No other thing was ever published in this backwards country.
Are you only considering Czech translations? Due to availability, or are you hesitant hesitant about reading English books?
If the former, I'd say there should be options for ordering online - even my local Dutch English-language bookstore delivers to the Czech Republic (at least, I'm assuming that's where you're based?); I guess shipping would only be worth it when buying bulk, but there should be better options; worst case amazon.de?
If the latter, consider trying anyway? Your English is definitely good enough; my own experience back when was that my reading speed increased tremendously after finishing just a handful of English books, and I've been reading nothing else since - it's
so liberating not to have to deal with crappy translations, nor series that they stopped translating halfway through!
Vitek: I am thinking about my dislikes but it is that I am mostly indifferent to some sci-fi stuff, not outright hate it. Sure, I dislike The Martian Chronicles but I like rest of Bradbury a lot, so it is of little indication of taste. I also read many W40k, ST or SW novels and I certainly hated some of those because they are simply shit, but as it is very varied collection of themes and autors it is hard to take something out of it.
I've got to thing about it some more.
Some more specific examples of books you were indifferent to also works for me - I'd just like to have some better idea of your taste so I won't blindly recommend what I myself like, but can actually direct you to books that'll work for you.
And yeah, I didn't care much for the Martian Chronicles either. Right now I'm getting the impression you've mostly stuck to "classic" SF - but I don't know if that's due to availability or preference? (I haven't seen you name anything yet which was first published in the last decade, maybe even two?)
I've read plenty of ST and SW myself back when. The best of them were definitely fun and worthwhile entertainment. A Stitch in Time, The Lives of Dax, the New Frontier series, Timothy Zahn's Thrawn novels... Not needing to do world building and just focus on a story can definitely be an advantage for some authors. Still, there's
so much out there that's better all around that it was an easy decision for me at some point to just stop with them.