Chrome, Chrome, Chrome, CHROME! Internet Explorer is terrible. Even Microsoft thinks so; with Windows 10, they are replacing IE with their new Edge browser. Literally, they threw IE out and made a completely new browser.
There are many reasons not to use IE. For one, as you have probably seen, sometimes it does not work well or has numerous bugs. I'll give you an example: I finally got my father to switch to Chrome last December. I had installed Chrome a while back on his computer and tucked it in a corner so he wouldn't notice. I had been using his computer at the time as my hard drive on my old laptop had failed and I was waiting for my new one to arrive, and I still had school stuff. When he went to get on IE, it kept crashing. He immediately blamed me for it. I figured out it was a toolbar that was making it crash and it would be fine if he deactivated the toolbar. He didn't. He ended up switching to Chrome. I hear a lot less complaining about his computer now, although he still thinks I did something to mess up IE.

So there's the fact that it gets buggy and doesn't want to work.
But it also has a history of security vulnerabilities, meaning it's not a safe browser to use. The most recent serious issue was last year, when even the US government was saying not to use it because it had such a major security issue. And that's just one issue in a long line of security issues.
This is a pretty good article outlining other reasons not to use IE
https://www.linkedin.com/pulse/2014...-not-to-use-internet-explorer-ever-ever-again
I like Chrome. Firefox is fine also, but I prefer Chrome. I have both on my computers so that if one doesn't work properly, the other does. Chrome is made by Google; Firefox is made by Mozilla, which is a nonprofit organization that made Firefox. Either one is fine. Better than IE, that's for sure.