I tried different ways, different strategies. The most comfartable and efficient was playing in 4 tournaments. I played using book strategy, so it was easy enough - i easily decided to raise, to call or to fold. With such decisions i was in the game not very often. May be it would be better to decrease hours. Now it doesn`t matter, i tried to get easy money and failed.
You tried to do what I and many did back in the day. There was a time when it was relatively easy to make quite a bit of money simply by selecting tables, selecting hands and betting on value, but it all started to go to shit with the Poker Black Friday of 2011, and from then on it all started to go downhill., There was still money to be made from poker, and I make income regularly, but it's nowhere near as easy as it once was.
One of the things that influenced a lot was the proliferation of poker schools and courses, which is the subject of this thread. As the level of the average player goes up, it's harder to win.
In your specific case, I don't know if you had some negative variance as well.