No, Ironically, it takes extra effort to stay socially connected in the age of social media. But it's important to do so because loneliness can be bad for your physical health as well as your emotional well-being.
Get proactive about combating loneliness. It can be difficult to reach out when you're feeling bad, but inviting someone to meet for coffee or joining an organization that will help you interact with others on a regular basis could be good for you. According to some studies, it might even help you live longer.
The internet has increased our ability to work remotely. That can be good for our mental health in some ways--such as by reducing our commute time.
But, remote work also means less comradery with your colleagues. Communicating via email or the occasional phone call isn't the same as meeting around the water cooler.
Sometimes, it's your co-workers who best understand what you're going through on a day to day basis. For many individuals, whether they're entrepreneurs or remote employees, work can be quite isolating because other friends and family members don't really understand what they do all day.
So, No social media and the internet are not making people less kind and more socially isolated. It makes people get to speak up to their friends, family, and etc about their problems.