As you known most people today argue that knowledge makes people unhappy. I am neutral against this view.
In my opinion, what is harmful is not information but the excess of information. Too much of anything tires a person after a while and starts to cause harm. Knowledge is one of the things that should not be exceeded. Because after a while, if you know everything, you start to have no prpose in life, and this completely changes your perspective on life and makes you live aimlessly.
Later, this excess of information can even affect you and your environment. If you use this on your friends and unintentionally act like you know everything because you know so much. After a while they may think that you know everything so well and look down on them and start to move away from you. For example, did you know that according to a source I read, the number of people who hate todays scientists just beacuse they are smarter than us is almost equal to the number of people who love them for what they did for us. Because human beings always see those above themselves as rivals. There fore after a while your feelings of anger and hatred towards each other will slowly begin to grow along with your ambition and sense of competition. In addition, if you use your sufficient amount of knowledge in the right place and in right way, the love of those around you will increase as much. In fact, you can see that the work is done a little bit here. What is important is whether you use your knowlege in a way that does not exceed the limit and whether you use it in the right place.
So what I want to tell you here is that too much of anything is harmful to us after a while and this can some how psition those around us against us. One of the important things here is that you treat those around you the same way and look at them the same way no matter how smart you are.