It definitely improved my quality of life. Prior to the internet, research was tedious and limited to whatever I could find in my personal or local library. I was hungry for information that I could not get.
Current news was limited to over-the air or cable TV, radio and hard-copy newspapers. If I doubted what was reported or wanted more details, I couldn't dig deeper than what was available.
Social media is a mixed blessing. I don't like the loss of privacy. I don't post anything on Facebook although I use it to check up on nieces & nephews and on local events/news.
I learn new things every day online. It's mentally stimulating; I like the challenge of sorting through the garbage to find the gems.
Too many predators, bullies and insensitive or downright cruel people like baiting others. I do worry about how easy it is for so many people to give up their self esteem to what others say online. This is especially a problem for young people in their formative years or for people who are struggling with self doubt.