I like your information and this three are all the most common problems of a trader. At some point we don't know how different traders use this but they are able to gain profit.
Trading to much is not good but for some traders who master their own techniques will trade too much but will exit after lossing some small amounts.

Trading too much volume
This is a high risk, high reward of course it need to be calculated and all trade plans should be followed or adjusted within the market. Many high volume traders manage to earn.

Knowing many methods
It is good if we know and learn to apply every single method in a profitable manner or with a strong strategy that we can used.