I kinda don't agree with this. Here is what I think....
The Losing Mentality
When someone who plays anything that is considered competitive (i.e. Blazblue, Guilty Gear, Pokemon, Mario Party:?: etc.) and looses then thinks their terrible at the game. What they will do is attempt to get better but go at it at all the wrong angles.
I myself went through said mentality and I decided to become better at this game, which I ended up doing, but once in a while when I have those "off days", that everyone gets, it will hit me rather hard. I start to think I suck , which tbh I'm not so great at bb, and get all sad.
I know its just a video game, but everyone gets like this no matter who you are.
The Winning Mentality
When someone who plays competitive games/sports tries his very hardest to become the best. Always keeps a positive attitude on things, although he may go through losing streaks here or there, and pushes himself to the limit.
One problem with the winning mentality is that players get really cocky to the point where they think their unstoppable, but when these players loose they end up raging and either blaming the opponent for being cheap or the games mechanics. For example people who say "I NEVER LOOSE!!!!" Yaya747 knows who I'm talking about.
Blazblue can have its wtf moments, but I remember a time were someone raged and said "I hate it when fighting games have the ability to block" Anyone who played with me a couple of months ago knows who I'm talking about X3
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Point I'm trying to make is that you should keep a positive outlook on things when playing games, especially blazblue, b/c you don't want to turn out like someone who cry's every time they loose b/c they suck or someone who is like lol I'm S Tier and rages when he or she looses.