It's funny how tech savy people on here are. I've never had a smartphone before and you all act like I'm buying some prehistoric stone tablet. Apple products hold up well. Really well. For basic web browsing, email, photos and what have you, this phone is more than ideal for me. I was able to buy everything I needed cheaply from eBay. It's amazing.
No, it's just that you decided to buy the worst-designed model in the entire iPhone line.
As long as you put some kind of case on it, you should avoid the worst issues. But you're not going to get most of the popular apps, because they've all been updated to require iOS 8, which doesn't work on the iPhone 4. For that reason alone, a 4S would have been a better deal.
But, if it works for what you need, and you got a good deal, that's all that matters right?