I think the reason why hs games are so laggy and unstable is because the games are hosted on the players internet so if you have opponent from country with bad internet you get lag and constant dcs if the game decided to host the game on your opponents connection
For example genshin impact game has this exact same issue
No, it’s hosted on blizzard’s servers. https:// hearthstone.fandom. com/wiki/Design_and_development_of_Hearthstone#Connectivity
I don’t think that is the case, i believe the base game obviously has dedicated server to host the game and the shop etc but the player vs player games don’t
https://us.forums.blizzard.com/en/hearthstone/t/hs-games-dont-have-dedicated-server/109276