Hi again !
i can assure you that the problem is not in our End.
I've never had such issue 5 or 6 years ago until they changed their system ( algerie telecom )
i have a FTTC line (fiber to the curb), my ping is close to perfect. Literally tried everything to overcome this issue... still failed. So based on the struggle i passed through. i can claim that the problem persists on the level of algerie telecom switchers, and unfortunately it can't be beaten no matter what we do. As you said, the best decision is to stop playing till the problem gets cleared