this is true, this statement is talking about individual's ability to success. Except this does not apply toward society in China. China relies on connections to government officials, not the individual's job performance.
"在国内混不好的,在国外也混不好;在国外混不好的,在国内也混不好我始终坚持这个观点。"
I agree, but those that do well out of China would not want to go back to China. That's the difference.
Cars, house, career success, they are not the only measurement for life. Family value, quality of living, moral standards also counts towards a good life. When I get older, these values worth more to me than social status.