If it says chicken in the label...

[Pickleypickles]

Chicken should be a main part of the dish!!
Just had a ready meal chicken and bacon pasta bake and it had ONE small piece of chicken in.
I feel ripped off 🙁

The flip side of the OPs grumble is meals that don't advertise a major ingredient in either the name, or description, and wait for you to bite in and spit out

Onions are probably the worst offender in this regard ...

Complain! Write them an email. Once I complained to Cadburys that my jelly candy bar only had TWO pieces of jelly in the whole bar and they sent me a £2.50 voucher. It is hopefully a portioning error!

Lucky seniorcitizen has so much time on her hands- maybe she could make the OP some dinner instead of putting on her judgey pants.
But seriously OP, it's a real disappointment when that happens.