I just declined a rematch yesterday. My higher rated opponent thought he had me and said "good game" in the chat before the game was over. He snapped off my queen and I snapped off his king. He wanted a rematch but he had upset me so I took a shower and got dinner. I ran the computer analysis and I was ahead the whole way and missed a mate in 2 before I got him.
edit: Here is the game. Apparently it is the highest rated opponent I have beaten.
People have lives, you know... They do things besides chess....
Do not feed the troll. If we cannot teach critical thinking in college, (for all who share the opinion that they were CLEARLY the superior player, and have the RIGHT (I don't see it anywhere in the constitution, and the ethical agrument for it is incorrect at best.) to demand a rematch, even though the opponent might have euphonium lessons..... (You never know.)) we certainly cannot change it on chess.com forums... I doubt that the OP will ethier A) ever change his mind, or B) (More likely IMO.) change his trollish ways.
This conversation is over....