I believe I have never been that frustrated with a game in my entire life

I have been playing for about eight hours non-stop with dragon priest on rank 4 and won exactly 50% of my matches for the first seven hours.
Literally every second game was against murloc knight Palas and I seem to be unable to win even once.
Tried playing Murloc Knight/Mysterious Challenger Pala myself and it didn't work out very well but I keep facing them all the time and it makes me go insane