issues with HTC 8X

I had a HD7 around 2 years ago for a while, the touch screen went bonkers and was unable work. After gotten the 8X, I started to really doubt HTC's hardware quality. 1. Colors turning black 2. Loose parts can be heard when shaked 3. Phone gets very hot easily 4. Lag/freeze in starting to type the keyboard 5. I also started to feel that the animations and the screen responsiveness is somewhat worse compared to wp7. There is lag when switching to and fro the home screen and app page. When i scroll up and down the home screen, the animation seems abit slow to stick to my finger. like to know whether problem number 4 and 5 is an wp8 or HTC problem. Thanks!