Can't open anything on my xbox take to long

Try performing a power cycle on your Xbox. This will reboot the system and help clear any corrupt cache that could cause the system to act abnormally.

I did that and it simply made it more difficult for me to play anything, now I can't check my library without my screen freezing, nor can I open up the xbox menu anymore. Another issue also started happening, the start up takes incredibly long now. Is there anything else I can try?

I had this issue, and the only way I was able to sort it was via factory reset. You don't need to do a full factory reset, just pick the option that will allow you to keep you games and apps, meaning you won't lose those and have to re-download them

How to factory reset

Make sure when you select the option you choose to 'Reset and keep my games & apps'

Also destiny takes forever to load on my xone. I recorded it and everything. Take a look at this.
http://m.youtube.com/watch?v=7R1TU7kfco4 is it soposed to take that long? Im very worried i have a faulty xbox. Also this video was taken right after i did the hard reset. Without opening anything else exept
the tv app

Hi, I hope you're doing great out there. I am an Independent advisor and I am here to help you in regard to your concern.

We may need to reset the console keeping your games and apps. Don't worry because as long as you're connected to Xbox Live your saved progress, games, will not be deleted. It will remove all of your accounts but you can add all of them later on.

Press the Xbox button to open the guide.
Select Profile & system > Settings > System > Console info.
Select Reset console.
Reset and keep my games & apps.