why so?

I'm not familiar with spanish politics, care to explain?

They just gave millions of foreigners the ability to vote for the government.

a quick search suggests that's just for municipal elections. As I understand the football internet blackouts are national government policy not municipal?

Regularization is a national policy. Soon to be followed by a shortened pathway to citizenship.

Do they not want to use the internet when football is on?

This person is annoyed because Spain is speaking out against Israeli warcrimes/genocide.

That's quite the leap. Not that it's relevant but I have no issue with european boycott or sanctions of Israel, though warcrimes accusations are pretty toothless. Almost no leaders past or present charged with war crimes were ever arrested.