I said you have no evidence, because there is none. I have seen his matches including a win over the world number 11 just days ago.
If you want to claim that he is somehow 'nowhere near' top ten level, all your work is ahead of you
Nick Kyrgios beat Nadal, the then world number 1, at Wimbledon. So, as a counter argument, does that make him a top player when in fact he was ranked outside the top 100?
Bearting a player of a certain rank in one match does not really provide evidence to back up the other player's ranking.
We all know that Andy is a top ten player on ability and skill and he's proves this. But on CURRENT form this year (notice the capitalisation), he isn't close to being a consistent top ten player. If the current form continues, his ranking will eventually reflect it.
By the way, I fully expect Andy to turn things around, and I wouldn't bet a lot of money against him actually winning the US open. Andy is that much of an enigma.