Sadly it is your projectors

Projectors are made extrememly cheap and are not meant for driving the way the release heat of the bulb is horrible, I had projectors and I was running through bulbs like you.

Others will say they have no problems, but in reality its just the set you got along with others, they are designed horribly for street use and each projector is different than the next.

I would suggest finding a set of OEM headlights and replacing them so you don't blow bulbs all the time like you are now cause its a money pit