I think it’s sad that social media seams to propagate an amplified version of what certain England fans are like. If you spend anytime on Twitter, Instagram, YouTube etc comments sections it is full of what I can only assume are children bickering.
Good sportsmanship, fair play and mutual respect should be encouraged. Laugh along and wish your opponents luck when they mock you, don’t stoop to their level.
Booing anthems, flaming, bickering and insulting etc is completely classless and against what I feel being a proper sports fan is about. It’s why people can’t stand us doing well.
That being said, if you take it seriously enough to get annoyed about it then you probably do want a word with yourself.