Not getting offered DK in arena (despite finished prologue)

see title.

Several times arena leaderboard player here. Stopped playing arena for >1 month due to totally broken meta. Started playing again after malignant horror ban.

Doing several runs per day but not getting offered DK. After so many runs I do not believe its just bad luck. I finished the prologue. I actually finished it several times by now, trying to “debug” my game. I’m doing fine in respect to winrate but quite an uphill battle to compete for leaderboard without being able to play the broken class…

Any suggestions? People with similar problem?