Problems with chess anxiety? I've been dealing with this for a while and the game can just sometimes be overwhelming. I really don't know how to calm myself and it might be effecting my play. I've been told maybe its because I don't do enough physical exercise but I'm quite fit so I know its definitely a psychological/mental issue. Maybe its my ego that can't take losing? After all I did put quite a considerable amount of effort and time in this game so it hurts to lose against someone you know who hasn't done the same even if its only once out of lets say a hundred games. Chess I think is probably bad for my health, I honestly start to feel hatred or anger towards my opponent sometimes such as if they play it like blitz chess or something. Maybe Its about time I just quit chess all together, that option has really slowly grown more appealing to be honest. Has anyone experienced something like this?
I really don't know how to calm myself and it might be effecting my play
Many people feel this way, e.g. becoming excited after winning material, or becoming upset when we slip from dynamic equality to a losing position.
To paraphrase IM Josh Waitzkin, who has a tutorial called The Psychology of Competition in the Chessmaster program:

Change your biochemistry to bring you back to the moment, e.g. take a break from the game, wash your face, or jog up a flight of stairs
Don't feel positively or negatively about previous positions. Stay objective and focus on just the position in front of you, rather than the preceding events. This is what a computer does

Chess I think is probably bad for my health
I'm not a doctor and I can't advise you on your health. If you feel that it is impacting your health, see your doctor. After all, your health is more important than playing chess.
Maybe its about time I just quit chess all together
Before you consider quitting chess, I would advise that you try a different, slower time control. I dislike blitz because I just don't have the time to play at the level that I would like to do.
Also, you may want to consider what it is that motivates you to play chess. Is it:

The competitive element?
The feeling of self improvement?
The artistry of the game?
Social engagement?
Something else?

If you don't feel motivated to play, then there is no need to force yourself into it.
Summary

What you feel is very common. Try to train yourself to remain objective when playing chess
If you feel the game is impacting your health, see a doctor
Reassess what you want from chess. If it isn't providing what you need, consider trying a different hobby