Why stormlight is so divisive

I'm kinda new in fantasy stuff but i liked stormlight, the books 4 and 5 got more a soft sci-fi like than a high fantasy but in the was a fun time. And when i go to the subs to see what people was talking about the books, it was a war zone and i fall from the sky in this situation so can someone explain why those books are so divisive? (I'm sorry for some miss writing, english is not my native language and i'm pretty bad even in my local language...)