By Matt Hladik It’s not unusual to see an NFL team wish its starting quarterback a happy birthday on social media. The Carolina Panthers did that this morning, posting birthday wishes for Sam Darnold. This sounds like a nice gesture, but things didn’t quite go as planned. In the quote-tweets and responses, you can see plenty of people taking shots at Darnold, who struggled in his first season in Carolina in 2021. Whoever is running the Panthers Twitter account had to expect this would happen. We included a few tamer tweets and legitimate well-wishes below. Darnold completed slightly less than …