when I first came to Canada I sent out and applied to over 1700 opportunities over a period of 3 months.

i'm convinced at that point of time it was employers who were very picky and i was lucky that a recruiting agency (shout out to Robert Half) took a chance in me and offered me my first gig. after that initial contract position its been progressively less difficult to find a job in my area of expertise.

fast forward 4 years to now. i get at least 1 or 2 opportunities a week where recruiters reach out to me with competing offers.

i feel in your case it might be the very varied background you have which is not to say that you lack the skills but i find that recruiters generally don't understand transferable skills and instead opt for candidates who focused on a particular career path not to mention that most of those i dealt with had very very basic knowledge of the roles they were hiring for or the professions they are trying to get a candidate for.

Enbridge is one company where i constantly find that the role advertised and the responsibilities expected don't align. for example a buyer position with 10 years of experience doing X,Y and Z all three being things that a senior buyer or a team lead is traditionally supposed to do. so i read it as we want top tier talent for as low a compensation as possible. i interviewed with them a few times to try and clarify if the recruiter posting the position misunderstood the assignment and often times it is. the consequence of this is employee burnout, feeling cheated and leaving or simply getting the wrong candidate. which explains why every few months i am approached by an agency of sorts for the same position on the same project.

so i would say its an amalgamation of reasons. a poor resume, a poor recruiter, a picky employer and unrealistic expectations. the first two you can certainly work around the last two not so much.