Andrei Iosivas is going into this season with a new mindset after he faced vitriol on social media last season, which included people direct messaging him to “kill yourself.”  The Bengals wide receiver said the situation last season “makes me angry” as he recalled the messages he got from fans during a campaign in which he had a team-high five drops.  All the anger and disparaging messages he got because of some of his on-field struggles made it hard for Iosivas to keep his head in the game last season, he explained to reporters on Tuesday.  “I feel like last year I was in my head a little bit,” Iosivas said, according to ESPN. “I had those drops in those games and people were telling me to kill myself and all that kind of stuff. I never had that kind of stuff happen to me before.…