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I think it's clear that the immigration system could use reform. It's not at all clear what the reform should be. The quoted 150-year wait doesn't quite exist, but real waits of 10-20 years are common for immigrants with lower priority from countries with large numbers of applicants (which are often simply countries with large numbers of people).

That people still want to come here despite having to put up with that is a testament to how powerful the draw to living here is. I can't blame someone for illegally immigrating when they see that the legal path will take so long, and that they could be building a better life in the meantime, despite the struggles that come from living here without papers.