I have been trading for so many years and yet to be perfect in my trading.
Honestly, I can see lots of improvements in my skill in theses past years.
I make some bad trades a few times, but I am still very much profitable compare to not knowing how to trade at all.
In my opinion, the market is very broad, dynamic and involves emotions, hence the reason it takes so much time to master.
Of course it'll take so long to master because it involves risks that traders tend to master every calculated risk and then trading is an undetermined goal oriented achievement that mostly the markets tend to be unpredictable making it difficult for traders to be profitable and master all it takes to skyrocket. So it requires patience a awhole lot cause traders tend to deal with a lot.