Crashing every single game

This started a few patches ago, I think it was 6.19 maybe...patch just before the alpha client was released. I tried the alpha client and loved it, until the first patch after its release made the game unlaunchable. So, I tried to revert to the old client, launcher worked fine, except at some point in EVERY SINGLE GAME, the client would crash "memory at xxxxxx could not be written referencing xxxxx", meaning I had to relaunch after every game. I've been suffering through it for months, and if i try to upgrade back to the alpha client, no download starts when I click the upgrade button, and it then tells me I must have the alpha client installed and fails to launch anything at all. again. I have no reinstalled this game 3 times, repaired more times than I can remember, and its still broken. Where is the actualk support for one of the largest games out there over basic failures at the client or launcher itself? Tired of it.