It's so unfortunate he lost his jobs, Well some people were in his support and claimed it's not his fault for the club to keep losing and the man was only trying to make extra cash, while there were others who claimed it was betrayal and he should've supported the club as a true fan.
In as much as I know that what he did was totally wrong, I don't see anything like betrayal in this case. I don't support what he did neither did not condemn his action because his bet has no any impact on the performance of the club. He's just victimized for trying to utilize the opportunity that every gambler will like to seize too. It's the club that betrayed him for invading into his privacy to investigate his bets. Is there any agreement between the employees and the club concerning this? I guess No! He's not a player and can not influence the game but only analyze the team current form and place the bet to make extra money, perhaps he's underpay in the club.
I won't like playing bet against my team but whenever I play bet in favor of them and they lose the game, I do regret it and wish to have played against them in the first place. I mostly avoid including my club in my ticket when they are playing against a strong team that there winning is not guaranteed. My conscious will not allow me to play against my club. It's possible that the employee is not a fan of the club by the way but just a worker and he has the right to play his bet as he wish even as fan.