Thats fair, there might be a better solution though if thats a reliable enough problem. At least you'd feel more secure you wouldnt oversleep.

For me routine seems to do it, I wake up the same time anyways, but if I miss too much sleep I have overslept before out of exhaustion.

But if that didnt work, theres got to be a loud enough alarm thats hard enough to disable to guarantee I wake up. At least wake up long enough to realize how exhausted you are and maybe call off work or something.

My sister had an ultra loud alarm when she was a kid but she slept through that too. I think you can get an alarm that vibrates or use your phone with a puzzle lock or something.

Sleep is important, its a worthwhile thing to do well.