The experience you had was valued, especially if you were hired as dec, and paid as such. But I don’t see why you should get priority for a base over a longer serving FO that has been waiting for years for his name to reach the top of that base list.
That has nothing to do with your previous experience, but more to do with company time.
The truth is that we dont care about fairness, we all want the system that gives us what we want, even if it disadvantage everyone else. You will never make everyone happy anyway.