As always the americans know very well how life in Russia was.
"after oil money came to Russia, quality of life improved"
Quality of life improved for people who sold oil.
"However, I can believe there was more garbage lying around due to decline in public services."
So quality of life for most of other people has declined, or is "garbage lying around" a sign of good quality (of life) ?
Yeah, that's a really strange claim about general quality of life in Russia. However, I can believe there was more garbage lying around due to decline in public services.