CX S/O
Dont know who you have been flying with but i have only had one or 2 guys like that and the way they treated the other crews on the flight deck was pretty similar. generally the crews have been great and i have very rarely not been invited out with them for drinks afterwards, in fact it has only happened with based crews who were off home.
as for the flu well that could have hit anywhere. and it affects everyone at CX not just new joiners, dont be under the illusion you could have put the start off and still had a job at CX. It does not work that way