Wait, what? In order for it to be rigged against you, it would need to be rigged FOR other players. BGs are a zero-sum play mode. If you're thinking "crap, those attacks sucked", your opponent is thinking "wow! Those were some lucky attacks".
No Battlegrounds is NOT rigged against me.
Battlegrounds is rigged to have shorter games or more excitement.
Yes, confirmation bias exists and like everyone else I remember when the RNG sucks for me and forget the times it worked in my favor.
I didn't think the game was rigged, but then saw too many statistically unlikely AI-precision attacks too often in too short a timespan.
Some sort of rigging is going on. But it is not against anyone in particular. It could just be there to cull opponents to shorten games --- we see how they like short games in standard and it somehow boosts revenue.
Use some basic common sense, please. What would be the point of rigging BG in this fashion? Why waste resources to assign each player a custom MMR cap and then adjust their triple rates on a case-by-case basis, just to make players unhappy?
This actually is an even better point than anything i've said!
This sounds to me like a mediocre player unsatisfied with their ability to climb and looking for something external to explain it. Very common sadly - not just in Hearthstone, but in gaming overall. Every matchmaking system aims to get players to their respective "correct" rating. If you don't improve you wont climb any further. Picking some random observations to "prove" anything is... oof