Strange that he starts flying the next day with Inter airlines! So he was not fired he was just sitting out his time with onur air and fedup that he had to work so much and frustrated that he not working for an major airline. Well it won't be different at inter airlines. They sort off pilots so also there he will be the only safe pilot and the rest will be unsafe. You really think they make us fly if the aircraft is not according the MEL? Nobody ever had a problem after starting engine's and taxi out you have a problem and taxi back in, does this mean the aircraft is unsafe? yes/no that's why you come back to get it fixed by maintance.
Greetz