At the start of 2016 I said to myself that this year I will finally read some of Dostoevsky's works and in late April I started reading The Idiot. I followed that with The Brothers Karamazov and Crime and Punishment, all in about one month. I know I am in minority when I say this but for me Dostoevsky didn't click.
First of all, he is a bad/average writer. Tolstoy imo is a much better writer and I am referring here strictly from a literary view (Tolstoy and Nabokov also thought the same thing apparently but Nabokov was a weirdo, especially when it comes to the stuff he told his students so don't take his word for it). Of course one could say that the language barrier is one issue and probably translating a Russian novel in any language makes it lose its charm but this does not happen to good writers like Jane Austen or Virginia Woolf.
People usually talk about his "psychological" writing as well but that's really an overstatement. Read any existentialist philosopher and see how easily he can dismiss Dostoevsky's ideas, especially the ones on religion. Some characters are interesting though and the interaction between them is great (he does this especially well in The Brothers Karamazov) but that's not enough to grant him the literary status he now holds.
I'd take Tolstoy or Bulgakov any day over Dostoevsky.