Typical ... how about "I played this game for almost 7 years and so my personal vision became very blurred and I got bored" ?
I am sure the vast majority falls into this category. Why do people always think THEY are the center of the universe,... well you're not, ... 6.5 billion others have their own experience and within X years the world will turn without you ... how strange that even may be....
Also if every game would be played for 7 years, well there would only be a handful of games left ...
tldr: you changed and played too long. A pity 99.99% of the players don't understand this very simple logic.