Game analysis along with opinions on the entire situation will be appreciated!
Did this guy take me seriously?

I thought not. He didn't play like a 2000. But it didn't feel like he played too badly, and I expected him to play more seriously after the first game.

probably playing on a phone, with bad internet, having a really bad day (yes this happens) or just a new account... one of those things or you got pretty lucky-
I mean skilled-
well I think you can tell for yourself.

probably playing on a phone, with bad internet, having a really bad day (yes this happens) or just a new account... one of those things or you got pretty lucky-
I mean skilled-
well I think you can tell for yourself.
Yes, I'm very skilled. Grandmasters beware!

probably playing on a phone, with bad internet, having a really bad day (yes this happens) or just a new account... one of those things or you got pretty lucky-
I mean skilled-
well I think you can tell for yourself.
Yes, I'm very skilled. Grandmasters beware!
But seriously, I'll check his account to see if he's overrated.

probably playing on a phone, with bad internet, having a really bad day (yes this happens) or just a new account... one of those things or you got pretty lucky-
I mean skilled-
well I think you can tell for yourself.
Yes, I'm very skilled. Grandmasters beware!
But seriously, I'll check his account to see if he's overrated.
Aaaaand he's not. The guy's 2000 in rapid and blitz too, has played over 40,000 games, and has won more than half! For comparison, I've played 'only' around 5000!

probably fooling around with time odds or just having a super bad time... it's unrated though so who knows maybe they were doing it blindfolded...

Maybe was not the rated 2000 person that was behind the computer.
Maybe it was his wife or son/doughter rated lower. It is possible.
I have seen here at chess.com an user that was a chess club and many people from this club
play with the club account.

Even if he was playing for fun since he didn't have to worry about rating points, I would think he would have more of a drive to win. You have to be a little competitive, right?

Maybe was not the rated 2000 person that was behind the computer.
Maybe it was his wife or son/doughter rated lower. It is possible.
I have seen here at chess.com an user that was a chess club and many people from this club
play with the club account.
This makes the most sense, especially considering he probably wouldn't get in trouble since it's unrated.
Yesterday I accepted an unrated 1 min game from a 2000 rated bullet player. I am 1500 blitz and 1000 rated bullet. I expected to get destroyed and maybe learn something, but to my shock, I won four out of our five games! I was ahead on time for most of the games, but I didn't just win on time, in most of the games I was dominating! So am I a secret prodigy, Is he overrated, or was he messing around since it was unrated?
EDIT: I looked at his account one more time, and have come to this conclusion (NOTE THAT THIS IS ONLY A HYPOTHESIS): This account was made by a weak player, who let a strong player (let's say older brother) play games on his account for while. Well, his brother played rated games and catapulted his rating rather quickly to 2000. Now the little brother is left with a problem: he doesn't want to lose all those nice rating points, but he still wants to play some chess. So he decides to play only unrated until he can become strong enough to stay at 2000. He has been trying this for years now, and occasionally plays a rated game to test his strength, and gets promptly destroyed. He licks his wounds and tries again, and sometimes he beats strong players and sometimes loses to weak players. I was somewhat of an anomaly, as I have a stronger rating on other time controls. I have no explanation for the 3 move wins against an account that was promptly closed, nor other strange and downright suspicious games on his account, but this is the best explanation I can give that would cover the varying strength of his games, and why he has such a strong rating.
EDIT #2: The first edit was from post #124 if anyone is confused.