Why do parents find it difficult to deal with adolescents?

The primary reason adolescents dont get along with their parents is the conflict of views and opinions and most importantly decisions. This happens primarily due to the generation gap between parents and the teenagers of nowadays.
This generation gap creates a difference in views and opinions and results in a different understanding of a same given situations. Hence there is a conflict between parents and teenagers thereby creating a heated up environment at home and the both sides getting angry at each other.
A teenager's mind is very reckless and he feels that whatever he does is right. Sometimes it is right because with dynamic society teenagers can interpret the rapid changes happening in the society, whereas we parents still glorify our 1980s and 1990s , so we fail to understand the 2020 teenage mind. But nevertheless,  they lack farsightedness and dont always know whats right for them, so we try to make then understand our ideals, but they tend to refuse it because to them they are right .
Hence the disagreement and anger issues.