ping in online games

hi every, i hope this is the correct place to post this.

basically my ping is fine everywhere else, except when i play an online game (it's a steam game called dota2 if it matters) and my ping is sky rocketing for no reason.. i play on same servers i used to play on and i had no problems before with 70 ping max (EU east and west).. now i hardly get anything lower than 500 ping even though my ping when in CMD is a stable 70 or so..

would love any insights, anything would help even if it was remotely unlikely.

thanks in advance.