If you're doing the same thing the day after the merger you were doing the day before the merger, you have no legitimate gripe. It doesn't matter that HIS 8 years of working for "X" bought him a Captain job and YOUR 12 years of working for "Y" bought YOU a F/O job. He is entitled to his Captain job (and the system seniority to continue to hold it...)_ and you remain entitled to your F/O job (and the system seniority to continue to hold it...).

99% of all this SLI BS is that one guy thinks he is somehow entitled to the other guy's job. Yes, I've "been there and done that", twice.