Does that football scenario mean that the rule of law doesn't exist or that it does exist and is being enforced?

I agree with you that both of those laws are stupid, but that's a completely separate discussion to what I'm claiming above.

Depends on how you interpret the ECHR.

Does it allow blocking half the internet during football games?

It almost certainly does not: https://hudoc.echr.coe.int/fre#{%22itemid%22:[%22001-115705%...

AFAIU this is common because lower courts often deliberately choose to not try to interpret ECHR, leaving that for appeals courts.