Terminated and Frozen are both pension losses.
With terminated the PBGC takes over the pension and gets equity in the company that distress terminated the pension and the amount you can get can be reduced, especially for pilots.
Frozen means you dont acrrue any future benefits, so that is still a loss of pension.
So dont say the pilots were the only one's to lose a pension, as so did the non-union employees at DL have their pension frozen, which is a reduction in benefits also.
And dont forget the Pilots negotiated a replacement plan, they had a say in what happened, did the non-union have that same choice?