You will not get placed with two GCSEs.
You will struggle to find decent employment at most levels with only two GCSEs.
I'm not sure you appreciate the magnitude of work ATPL groundschool/CPL/MEIR/MCC+JOC/Type Rating/Base training/Line training is. If you can't get past GCSE's, I'm sorry but I really must insist on making sure you realise that you will not be able to handle the learning curve at CTC. People can and do drop out.
You need to be honest with yourself about your lack of success in Year 11 and what caused it.
If it was personal/family issues then fine. Resit all of your exams.
A lack of motivation/attitude? That is not compatible with being a Pilot and you will need to immediately turn that around.
A lack of ability? Sorry but again, the workload dumped on you by CTC is on a different level to anything you would get in the first year of undergraduate studies nevermind GCSEs. The sheer volume of stuff is like drinking from a fire hose and requires total commitment day in day out to keep on top of it.