1st half offense

I don’t get this play calling, why does Shelley keep so much??? Why can’t the O-line give Shelley more than 2 seconds on a designed passing play?? So frustrating to get into field goal range and as I say “now just don’t give up a sack” and that’s exactly what we do. This first half offense the last 3 weeks has been incredibly frustrating. Defense is slowly starting to give after being on the field for what felt like almost the entire first half.