The lecturer supposed to grade my presentation fell asleep while I held it. Should I complain?
The first thing to note here is that sleeping in such situations is often not a voluntary action, but a physiologically unavoidable response to the situation the body is in - many people die every year after falling asleep at the wheel of a car. I don't think you'd describe the results of that on other people in the car as "rude". In general, if you are in this state of involuntary somnulence, then no amount of caffeine will change anything. 

You do not know the circumstances in which this lecturer is in: casual lecturers or adjuncts may be working several other jobs, or may have insufficient income to afford rent and therefore a proper place to sleep. Permanent folks may have so much work that they literally don't have time to sleep and complete everything they are required to do. Or they might have a young child or as you say, mental health problems. My point is these things may not be voluntary choices for the person concerned. 

If i had a dollar for every student that fell asleep in a lecture that I had spent days preparing... 

But....

None of this is your problem. You deserve not just to get the correct mark for your work, but also the feedback that will help you improve - after all, you are there to learn, not to get grades. As others have said, wait and see what the feedback is (and really you want proper feedback, not just a grade). If it's fine, then I'd wait and see, but even if it is - if this becomes a pattern then it might be in everyone's interest, including the faculty member's (depending on how understanding the Chair is), for people to know what is going on.