I agree too. The penalty arrogance is just around straw number 65 in his antics for the last few years.
The drink driving, the laughing gas, the instagram antics, the twitter meltdown, the lack of effort to get himself fit back in the team, lack of effort to try in games he has played, lack of respect for his team mates, the fans and don't forget the company that pays him more in a week than most of us earn in a year in a contract he happily signed not very long ago.
All in all he sums up everything wrong with a modern day footballer.
The club are not responsible for his actions or not 'getting the best out of him' or him 'being inexperienced'
Hes a 22 year old fully grown adult he's not 12. The only person who is responsible is Saido Berahino himself.