In your 3 games against him/her:
The first game looks pretty normal. He was winning, but he gave you time to promote.
The second game looks as if after not seeing the knight fork, he just gave up.
There was definitely something wrong in the 3rd game. He just randomly sacrificed pieces for no reason.
So, today, I played this random guy on chess.com, 3|2 games. He was obviously very mad or on tilt or drunk or something. He just went after my King and then blundered some pieces. Then I just won effortlessly. I can't say he's noober than me because his rating is close to mine, just having a bad day.
The best part was he wanted rematches. So of course I took rematches, I got tons of EZZ wins and rating points!
Am I bad for doing this, taking advantage of this poor guy for some ez wins? Do you guys do this sometimes?