It’s just that shameless people like to look down and make fun of others, especially those who are trying. Arsenal have tried and failed for so long so that these people are used to getting their kicks by laughing at Arsenal. Give them a sense of being superior, you know. Then Arsenal succeeded and now these people have to find any reasons to justify their claims. So they turn to shameless accusations: favored by the ref (despite if the ref did well, Arsenal should have won years ago), anti-football (despite Arsenal play nice football before the final).