Should I downgrade my Samsung Galaxy A3 from Lollipop back to its previous software?

I bought my Galaxy A3 quite recently and it works beautifully. I had done a software update right when I bought it, when it updated automatically. Yesterday, a notification for a new software update popped up, and trying to wipe out the notification, I accidentally pressed Install, and then there was no way back. The Lollipop update was installed and it's more fancy and graphic than the previous software, but I really don't like it and as I feared, many of my apps started getting stuck and my phone often shows a blank screen. I found a way to downgrade the software via resetting the factory settings, however I'm afraid that if I do that, there will be even more problems. What should I do?

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