Then you, or your DM, isn't playing by 5e guidelines. That's fine, but hopefully the games rules have been adjusted to reflect this, since characters will be far more powerful and encounters more easily overcome. They have several variant rules in the DMG to cover exactly this. Of the DM can just chuck more than Deadly Encounters at you and risk TPK. (note that 3 Deadly Encounters is within the DMG guidelines though.)
I agree that I'm not playing by the guidelines.. was just wondering if anyone else was, or how common following or not following the guidelines was.