Tried to farm for golden hero portrait at standard rank 20.

I think that the number of meta decks, some even potential bots, is very high cause my win rate is rubbish at that rank with anything other than shaman decks. (I don't have the cards to make pirate warrior work)

I changed my range of ranks at which I'm farming and I'm actually seeing much better results.
I did this by disabling the concede after victory option and instead chose to concede when I'm at rank 18 - No stars.

Does anyone else see this happening or was it just me?