You’re behind in your understanding of what these colleges want in applicants. If you’d dug deeper, you’d have found details like acceptance rates. You don’t seem familiar with what the holistic process is, the lingo, etc. Your background doesn’t position you competitively for stem. And chances are rough for Canadians.
Rather than circle through a list of equally highly competitive colleges, you should be looking at better matches and safeties.
It is not easy to get into these colleges. Period.
And for the top tier colleges, no one gets in because “I want” this or that. You need to match what they want. That requires a better understanding of everything.