Consider this:
Do we give up walking or running if we fall and hurt ourselves? Do we give up driving when we meet with an accident?
When we fall while running or walking, is it the road thats plotting something against us? or is it the shrewed car thats been conspiring an accident all the while?
My dear friend, we all fail most of the times....because we make mistakes (I do agree a system error also does it...but how many times?)
When we fail, we think that the entire universe is conspiring against us. Trust me, its never so.
In trading, when we loose, how much time do we spend introspecting the reasons and what amount of time do we spend blaming everything else?
Now, did your trades backfired because of your knowledge of technicals? If yes, then did try and find out why? were your concepts wrong? were your application of the concepts wrong? were your stop losses in place?
Or was it greed? say when you eneterd a trade, did you have a target in mind? was it realistic? if the target was achieved, did you exit or waited for something "more"?
Introspect brother, and you will have your answer....and the learnings from your mistakes that no classroom would teach.
End of the day, its just a trade, not the end of the road.
Cheers