I was being bullied when I arrived US in middle and high school. Good thing I had a good big friend and learned Karate for a year before going to US. Showing some kicks did put some people back.
I can't help but think why Johnny went to US at the age of 8 and speak English with no accent and word choice so natively as opposed to some claimed bilingual podcast host who also went to Canada at very young age but speak with strong Taiwanese accent and non-native word choices. Did that host only spent time with his Taiwanese friends in Canada?
There are folks who were born and raised in China town sometimes who speaks little or no English. Learning is both a choice as well as environment. I went to California at age 12 with zero knowledge of English but by 18 I spoke fluent English natively, but I worked at my dad's liquor store from age 12 and had to speak broken English quickly after few months. Cantonese is so widely spoken in Vancouver, when my cousin moved from Taiwan to Vancouver in the 1990's, his Cantonese greatly improved but English was still pretty bad. LOL.