IMO it's not entitlement. It's just frustration and venting. Lets be honest, RJ FO wages were not meant to be lived on for the better part of a decade.
Keep in mind that at Emu's place and at the regional I was at, back in the day it was very common for FOs to upgrade at 1-3 years. At my old place, they took DECs for a while and most upgraded there in less than one year to 2 years. Guys hired in 2007 (like Emu and I) were then totally hosed once Age 65 passed, and less so by the recession. Age 65 stagnated any major hiring for 5 years, so us regional guys were stuck for those 5 years in the right seat. I wouldn't call a complaint an entitlement, it's just venting. But telling a CA he's taking your seat is pushing it. That CA is still there because the majors stagnated their hiring. And now they get stuck up in their own mighty greatness and/or call only the military or the heavily connected.
At my current gig, I had a United 747 CA jumpseater up to SEA who said he was on the 777 back in 2007, and that once Age 65 passed, it was good for him but bad for his FOs, and that he felt bad for them, and that they complained because they were stuck in the right seat of a 777 for 5 more years. I told him I was stuck in the right seat of a RJ making 30 grand for those 5 years. That got him to admit that they didn't have it that bad, and it was still a good deal compared to LCCs and regionals.
Another factor is that past performance is not an indicator of future performance/payout.
Derg, for your comparison, yeah you weren't a 727 CA or a L1011 CA but at least everyone at your level (United, Continental, Northwest, American, US Airways) all stagnated the same way and there were no 6 year upgrades after 9/11 (save Continental for a short while). So everyone went through the same pain.
And to compare that along the same lines, I have 3.5 years here at my company and I'm barely at the 50% of the FO list. Now these same 3.5 years if at Spirit would make one a line holding A320 Captain. At jetBlue it would be a reserve A320 Captain. At Frontier, it's a reserve A320 Captain. At Allegiant, line holding CA on the MD80 or A320. So obviously I picked the wrong LCC. I'm no different than any other pilot that went to the other LCCs 3.5 years ago but their career has had a vast different outcome making 1.5-2x what I make. Now that having been said, I'm not gonna complain because at least at this LCC, even if you're stuck in the right seat, you can still make six figures. So I make cheddar and go home. If I was at my regional today, I'd be at 8 years and still be a FO making bad regional wages. Emu is in this same boat. As are others. Now again if someone says the CA shouldn't be there, and that they are stagnating the FO career because they are not moving on, that's not really the FO's place to say that. But if a regional FO wants to vent about his predicament, I get it. I can understand.