They don't have the players to finish a game. Herro is fine as your 3rd or 2nd scorer but when he has to be the main scorer in the NBA and who you are relying on to close out a game. Yeah that is just not going to work. He is just not that type of a player. The Bucks basically will have to blowout teams or get lucky and have the other teams main scorer go cold in the 4th to win games.
Will they get lucky here and there and win some games they shouldn't sure, but I wouldn't count on that happening a lot. This is a bottom of the league team in the East and possibly in all of the NBA. The Bucks could have the greatest coach in NBA history or in basketball history and this team still wouldn't win many games. There is a clear lack of talent on this team and I don't see this getting better at least not this season and probably not next season either. I will be surprised if this team wins more than 25 games this season. They are not as bad as the 2012 Bobcats but they sure look like it at times so far this season. That team only won 7 games in a lockout shortened season. But the Bucks may start to look like the 2014-2016 76ers who went a combined 47-199.