Its not my fault that they got scammed by diploma mills, join the club. Maybe the prices they paid for tuition wern't worth it.
But don't take it out on the rest of society, basically.
In some sense, they bought into a false sale of goods (like most), but immigration is tough and they ought to realize that they lost out, that theyve overworn their welcome, unironically, and that now is the time to leave. Theres basically no sympathy from the local population, because they are actually a net drain on society.
Not through the taxes, but in completely fucking up the rental markets, job markets, and causing the nation to unironically get less and less safe.
They can go about saying "well its not my fault that youre not willing to do close-open shift at Walmart" but literally in every McJob you see them in, this is the contract theyve accepted and they basically eroded Canadian labour rights overnight. None of this stuff would have been normal even a decade ago, but now its the direct reality when you have millions clamoring for a handful of jobs and a completely saturated job market.
Even when it comes to jobs doing basic coding, doc center, help desk, etc- they flood the market, accept less of a wage, and have made contracting employees (with limited rights and clauses for horrible hours being accepted) becoming the norm.