Player's strengths: As far as I know, nobody of your opponents has won a PB yet, with the exception of Dude, who was a very strong player....10 years ago or such. It's hard for me to rate them against each other because as klops said, everyone knows how to play properly. I do know Flunkys style quite well because I played Portugal with him in the 75. He crunches numbers...often and can optimize the yields very good. Empirate and Mr.X can do (and will do, probably) as well. What is a very good indicator though: The more or less frequent story updates. This is allowed metainformation for you which is a technical necessity.
Rather than checking what led to Empirate's comments, I can say for myself, that you were not necessarily claimed as "bad player"...the map of 81 was very special. You proved in 83 your skill which is overall - I think - on par with the other players here. However, there is a vast variety of time spent in the game, the story, the optimization, even in the very beginning. Therefore some civs will exploit their advantages much better than others which are more "casually" led.
Klops wrote the guideline regarding comments in the stories. Please trust this more liberal and interactive approach. We have a meta thread for the crowd in which we discuss all things you players aren't allowed to see. That diminishes the urge to spoil something in a player's story because you can cheer, facepalm, be super mad or whatnot just in the next room. Rocking this many PBs in the forum, actual spoilers are very rare now (and generally immediately called out with a virtual slap for the responsible person).