Our system, the US, but also the west in general, is designed to make you feel alone. It is designed to fragment and alienate the working class. It is designed to exploit and extract as much from you as it can.
The fact that we don't all feel like this constantly is a miracle. There's been a war on since this place was founded and it's always been the rich vs the vast majority of people.
Therapy can help and I highly recommend it. Understanding your enemy can also help. Ultimately, I find the most relief in connecting with other people. Talk to your spouse, talk to random strangers, talk to your kids. I'm an introvert and socializing is exhausting, but it's also the only cure for the malaise of a sick society, in my opinion.