Safari, Chrome and firefox all slow on mac

Woke up two days ago to find that loading certain pages like twitter and reddit were loading slow, and without images. Now all websites are taking an age to load. However my PC, macbook and all other devices can load pages fine, regardless of distance to router. The problem is the same using wifi or ethernet cable.

Tried googling the subject for the past days in my spare time, but none of the solutions such as repairing disk on disk utilty, changing dns servers, restarting and updating router and updating osx. Thought it may be my profile on the family computer so I deleted that and created a new one but that hasn't solved anything.

Attempted traceroute on various websites and that resulted with some nodes (?) showing 3 asterisks and other response times being large. Thats the top of my knowledge really.

Thank you for any help.