When you were a hardcore Gaga stan during the Born This Way era, when she was at her gayest, most pretentious and most preachy, but have somehow become too cool for school to be associated with her, the natural instinct is to lash out.
Zayn won't reach the credibily he's chasing with his "Im a real artist" and the constant trashing of the One Direction, he's no JT clearly, when his album will underperform/bomb he will switch from Fist's rihjects to a wanna be Bieber 2.0.
Justin would be over after this era anyway but thanks to Zayn it will probably happen as soon as possible.
His next era will be a huge flop and when that happens he will surely overdose on coke.
Hopefully he will die cause if he survives he's gonna rehash this whole current era with a 'brand new clean image' and probably see some level of success thanks to his twisted supporters.