Hey bud, let me chime in here. I am an ex flight instructor and pilot recruiter for a 705 in Canada.
i am a big advocate for getting an instructor rating as a way of getting to an airline as soon as possible, jazz and porter hire f.os with instructor time only.
One thing that stands out to me is you have 530 TT but your looking for a job, how did you accumulate this time?
You resume to reads to me as 530 tt, 380 PIC, 100 IFR . Super charged senecas, “actual” instrument and 100 TAA is irrelevant in a resume and may even come across as over inflating your experience to some northern operators. Humility and honesty are fundamental to getting a job in Canada.
You are right you won’t see flight instructor ads in Canada, that’s because flight schools usually hire their own flight instructor students. They don’t need to advertise as they are continually qualifying and then hiring their own students.
I don’t understand your last point about getting and paying for another 150 hours in the US.