Someone's expectations are too high when back-of-the-bench 2nd round rookies are somehow expected to play like experienced veterans. That says more about the OPs lack of reasonableness than it does the players on the court. That's not a personal insult, that's a simple fact.
All it takes is to look a a guy like Draymond Green to understand this. Dray was terrible his first year. .354% eFG and almost as many personal fouls as points. Now he's an All-Star. That doesn't mean that Nader or Semi will ever develop into even good role players, but it does show how much of a learning curve most 2nd round rookies need to go through to get anywhere in the NBA .
The constant mentioning of Green, as it relates to either of these guys, really needs to stop. Not only is it laughable, but it's a discredit to Green and what he accomplished at the collegiate level. The guy was a first team all-American and led Michigan St. to 2 final four appearances. He's never been a good shooter, but he's always brought passion and toughness to the team. Most importantly, he's never looked lost; even as a rookie he played with poise and confidence. That's the polar opposite of what you see in Semi and Nader, players that look as confident as Adrian in Rocky 1.
Player development is not linear; sometimes players simply don't improve. These two guys have combined to play roughly 1300 minutes and I haven't seen one shred of improvement; in fact, they seem to have regressed.
Does rookie Green remind you of either of them?
https://m.youtube.com/watch?v=LUlyhysD9Lo