iOS 5 Biggest Problem

I know my iPad is a bit old and out-dated(it's the first generation), but iOS 5 on it has some problems, but the biggest one is a problem that I never seen on iOS before: Instability.

Even after updating to the beta 4 yesterday the OS is freezing and a lot of games are closing(looks like memory issues). Even applications like the Engadget iPad Application after selecting an article the application blanks and closes.

Two days ago I bought a Galaxy Tab and I'm enjoying the combination with the Galaxy S (2 months with it already). I've made this because I'm very disappointed with Apple. I thought they would bring more customization to their OS, but almost nothing was made. Also copying the Android notification style wasn't a good thing.