My iPod touch screen went fuzzy with pink and white stripes

Hello! I really appreciate if anyone would tell me what's wrong with my iPod touch.

I have been using my iPod touch for less than a year, and honestly, I have quite a bad habit: I always use it for playing games. And sometimes, I even use it while it is charging. Usually it's fine, nothing went wrong, so I keep doing the same thing sometimes.

one day, I'm visiting my relative and tried to charge my iPod. Since my iPod doesn't have an adaptor, I usually charge it using my laptop (the seller told me to charge it in a laptop/computer). One day, I borrowed my cousin's laptop to charge my iPod, but she only gave me an adaptor (not made for iPod or any apple products, but it fits so I thought it's okay). But the next day, I found out that my iPod went off by itself and I know that my battery isn't low.

I Tried to charge it using my laptop at home, but it still went off! Also, it went normal in my laptop (the iTunes appeared automatically, as a sign that my iPod is charging). So, I tried to restore it and I worked (at least I thought so), until I saw my screen went fuzzy (pink and white stripes). So, almost everyday I turn off my iPod, turn it on again, wait for a while, then use it normally. Usually it lasts 'normal' for hours, but it will still be error as usual.

So, my question is:

What makes my iPod touch screen went fuzzy?

Is it because I used it while charging?

Is it because I charged it with an adaptor that is not made for Apple products?

please help me, I don't know what else to do! I have restored it, I didn't download many applications like I used to before, and I left it alone when I was charging (I didn't play it while it's charging any more), and I even didn't turn on the Wi-Fi if I'm not using it (I almost NEVER turn off the Wi-Fi before my iPod touch went error)

Thank you for answering..