It’s harsh but my feeling on those is that as a defender you’ve given the ref the chance to make a harsh call. It’s not a 50/50 or body to body, the only reason to have your arm on the shoulder is to slow/impede the attacker illegally. You’ve also not made any attempt to play the ball so technically a red can also be justified.
All that being said, it’s definitely ‘all about me’ brand of refereeing.
