Hey harry,
Did you watch the champions league? I hope you could push through the best thing I know from my experiences is that self exluding is the best option you could do. I also use K9 web protection. It is really good software and it is free and it filters the webpages about gambling. you can only visit them if you fill in the password. best thing to do is to make a password that you can never guess again. go to encipher.it and press the blue button and fill in something random like afjaldkfjlfjsafnlvjweiwo and press the blue button again and you will have a password that you will never crack again press the copy button and use that as your administrator password for K9 and restart your pc.
with that you can never acces gambling sites online and you don’t want to acces them ever again. I hope this helps for you atleast it helped me