While it is correct that none of the administrations since 2001 has improved anything in this regard, under Trump things are definitely not becoming better. Those who are telling us "but only illegal immigrants suffer", are wrong -- everybody is having it much worse, illegal immigrants (who are people too, and most of them are not doing anything wrong), legal immigrants (waiting times and quotas are getting nearly impassable), and American citizens, who have their rights violated.
Some of the Americans still think that most of these things are good, they think that all immigration is intrinsically bad for America, and perhaps they voted for Trump because of that. I, of course, do not agree (as an immigrant myself, from Russia to Switzerland), but as American voters, it is up to them to decide, this is a valid point to start the discussion -- as long as the truth is acknowledged, and not hidden behind statements like "it's only about illegal immigrants".