people now are less happy or less satisfied with their lives than people were in the past

Do you agree or disagree with the following statement? Because the world is changing so quickly, people nowadays are less happy or less satisfied with their lives than people were in the past. Use specific reasons and examples to support your answer.

Admittedly, with the rapid development of society and economy, the modern person's life standard has been dramatically enhanced. The changing world has brought us new innovations and has changed our lives greatly. Some people consider that with the better material life, modern citizens can enjoy a cheerful life that the past people can’t envision. On the contrary, there are another group of people who believe it is the modern material life that deprives them of their happiness. As a modern person, I think the second explanation is more accurate.
The world is changing so quickly that it causes a lot of stress and anxiety in people’s work. Hence, they are less happy with their lives. People nowadays have to work very hard, because it is only by doing so can they catch up with the ever-changing society. They have to pay a lot of time and energy to learn some new technology and new skills in order to fulfill the requirements of their work. For example, as an architect, I not only have to learn the knowledge about my major, but also have to learn foreign languages to communicate with my customers and computer knowledge to tackle with working software. In the past, most workers only have to master one or two particular skills to complete their work, which is much simpler and easier than today. In the present situation, people can hardly feel satisfied with their lives.
The rapidly changing world has a negative influence on people’s personal lives, thus they are less satisfied with it. As we all know, too many changes cause people to adjust, making their lives busier and much more complex than before. They have sacrificed a massive amount of time, which could have been spent on communicating with their beloved family members and friends to catch up with the world their lives, and the current circumstances makes it hard for them to sustain a healthy relationship. They do not have enough time for relaxation or entertainment, which is harmful for their mental health. In contrast, people in the past could easily get the sense of satisfaction and lasting joy from a quiet and slow-paced lifestyle.
In short, people born in this modern society are very hard to satisfy and feel less pleased when being compared to the people in the past.

Red corrections are grammatical or necessary, while the blue ones are for a natural flow of the essay (or my personal preference), and can be ignored. I suggest you write the essay where the first part tells about the past/present then the next one compares the two times so that there will be a clearer flow of ideas in the essay.