"...and 4 months later, even if my error report are automatically submitted to them, they didn't even bother fixing it, I had to troobleshoot and fix it by myself."
This is especially frustrating and I know what you mean, but on the same token, it was bound to happen due to the various factors that in addition go into consideration for error reports being sent to Microsoft. Sometimes, what seems like a quick fix to us can be a question of priority for them, when they take into consideration the number of users experiencing the same issue as well as number of users reporting it collectively. It's unfortunate if we fall under the minority in dealing with these particular events as sometimes it's faster to discover for yourself through your own means then to rely on any help given anywhere...but I digress.