Help The new update 5.0.1 for Galaxy S4

[AMMA]

I'm from Saudi Arabia, my mobile Galaxy S 4 has been updated 6 days ago through air, in short it’s a beautiful update, but there are some major and very disturbing flaws, such as the constant interruption for Wi-Fi and Bluetooth, and the long delay in opening applications, along with various other defects. Is there a solutions to these defects, and if there is no solution how can I remove this update