Gladly, when I started out trading with paper money as a beginner, I thought I knew everything that I needed to know about the market. I had my glorious indicators on-hand and my customized charts, fully loaded with colored volume panel but then when I started trading with real money, I nearly lost it all, and I was deranged with fear, over-confidence (or lack of it), and a whole mix of different emotions. I blamed the market for taking my money and I couldn't "see" it for what it was. After continuously losing capital each time I reloaded my account, I finally decided to stop trading, and I had to in a way "know thyself." I started investing further into education on trading, from trends, to psychology, probability, discipline, etc. I stripped the market down to see what made it tick, and what it was made of. I removed all of my indicators and studied price action, supply and demand, support and resistance, trends, pivotal points, and so on so forth. I removed myself from other traders and market news during trading hours. I built my own system for trading, and instead of trying to predict, I started to base my trading around probability. And finally, I added a "stop loss" post-it note onto my monitor.
I didn't get to go over all the points but that's the basic idea. I couldn't see nothing until I lost everything. Always keep an open mind, discipline yourself, and don't blame the market because it's most likely "you" that needs a little reevaluation.