Minecraft has completely stooped working sense the new launcher.

Ever sense the minecraft launcher was completely changed a while ago, minecraft always crashed on the start screen. I have tried reinstalling many times, and right after the update that broke everything for me, when curse still used the old launcher everything worked fine, so I am almost positive that it has something to do with the launcher. As a little add on the launcher itself works fine for me. This affects all versions I have tried.