Did you imagine you were replying to something else? I was replying to someone who believes that Blizzard Devs micromanage the game to rig it against them with elaborate ways like finding counter opponents; they have to rig nothing to make them lose easier; they can just raise their MMR if they win a little.
The Elo systems (not ELO (it’s a surname)) can be tuned with different K-Factors. Hearthstone appears to be tuned with a large K-factor because it appears easy to lose with a short win streak and vice versa.
I get the impression they have overtuned the K-factor in order to aggressively bring players closer to 50% win rate, though there’s a chance it’s dynamically lowered the more games you play.