Then you don't know enough about how well, for example, African and central Asian refugees or immigrants do in a single generation. Same for Hispanic immigrants within a generation or two.
In a generation? I moved here from Europe and within ~6 years accumulated as much wealth as my parents did in a lifetime.
The American dream is still alive and kicking for many if not most immigrants.
But my american friends have a fun joke they like to say: "Wow look at that immigrant work ethic! Wish I could work that hard" ... you could
“Bad” is extremely relative. Some of my good friends were actively getting bombed by USA just 600km south of my city when I was in high school. That’s like living in SF with an active warzone in LA, if they were in different countries ¯\_(ツ)_/¯
The plight of a progressive Nigerian immigrant whose family was extremely wealthy prior to immigration is worth more than your story in today's climate.