my view:
Daves problem was drinking: Funny drunks ( JH & LU) + Angry drunk ( Dave

) = Bad
so he gets kicked... and with that, megadeth forms, and the long feud begins, the media making it worse than it was uptil the B4 tour....
metallicas style and playing soon propelled them to new heights, even before the black ablum, Master was kicking ass, and then the whole cliff burton tragedy brought them to spotlight faster than megadeth could keep up... the first album from dave seemed more like a " i think im better than metallica so fuck you" alsum, but he soon went his way, he got fans, and well the media couldnt find anything else to report...
I respect Dave and i do like megadeth, but i find metallica to be my favorite of all time...
just as dave had his screwups, metallica screwed up, toturing jason, and then James and Lars having kids, which then lead to Jason's departure over his full deviation to music... and here we are past the B4 euro tour, Dave hugging metallica and friends, and we are all happy united metalheads....
thats my two cents