Season just started a few days ago. Its very difficult to rank up at self play, so its even more difficult with a (stupid) bot. Just retry later the season.
I don't know why people ask this. I literally took a build from the guides subforum that said something like "Rank 5 Paladin" and then got rank 5 with it. This is on NA, too. Please search the forums before you beg to get spoonfed.