once I was trying to play arena using bot, but I resigned when I saw on first round playing paladin that bot don't play avenge on first round when nothing was for 1 mana in hand except that. This first bot move caused that I lost game. you really was lucky with picking because when you have powerfull deck yes, sure bot can win 3-5 times, but manually I would win 7 or more with same deck..
Now every card from BRM will cause mess in bot, for example when your opponent will put Grim Patron on board and bot don't kill it one-hit you will have lost game, bot will hit him and he will multiply. One card from BRM on board and bot is defeated.
This 5-10 wins I would say that's your bot records and probably not in this meta.