You registered a personal account,
You shouldn't import groups which are irrelevant to you in the first place. If you already did, then delete them. Then you won't have to wade through so many channels every time you want to do something.
Every Internet Browser has a built in search function.
Press the button F3 on your keyboard and you will get a search field at the top right of your borwser.
Use this to search for any text on any page on the internet, you are actaully on.