I have a veiled chameleon and for some reason his crest on his head is bent I don't know if this is anything to be concerd about but I just want to make sure its not anything wrong
It sounds to me like MBD, but it's super hard to tell without seeing it. If you could post a photo, that would be very helpful. Also please fill out this form so that you can receive more effective help: https://www.chameleonforums.com/how-ask-help-66/
Can't see all his legs, but if he is your avatar then I wouldn't be real quick to call it MBD because his legs don't appear to be bowed. Sometimes their casque can just do that. He does look a little dehydrated though make sure he is drinking. Fill out one of the care sheets so we can better help and possibly answer your question.
Yah, usually veileds' head crests taper back a little so that it looks like a shark fin.
My veiled's crest looks the same. Other than that your chameleon looks pretty awesome!