The main problem that most people forget is that unless you have been using one for a long time and know how to use it then you are not going to even make a profit during the bull period.
Yeah, I understand some people may ask "how will I lose money during a bull period when things are going up", but even during bull periods there are times when there is a small correction and that's how you lose money. But, if you know how to use it then you could make profit even while it is going down.
This is why I believe that we should not be really giving up, but not expect too much at the same time as well, it is something that requires you to work to learn.