In order to escape these illusions, you need to be able to think critically and reason what are facts and what are illusions. You have to be able to read about a topic and understand meanings and context, then from there you can get a deeper understanding. Knowledge isn’t just knowing facts, but understanding what makes them facts.

Referencing your words in a different comment, to find out the the world isn’t all beige, you need to go out and experience the world. Take a step back on things you think you know, and try to see them from a different perspective. Read counterpoints to your opinions and study the basis behind them. The more you branch, the more new information you will discover, which will open the door to more knowledge and can help break these illusions.