Ahhh this is exactly the sentiment I'm feeling now too (unfortunately I'm two years into my program so I'm going to suck it up and stick it out). It's nice to hear though that is a common feeling among people, makes you feel less alone.
I do agree the isolation is a big problem that I didn't see coming, and I didn't realize just how much I need to interact with people until I had no interaction. I've realized you just have to make an effort to seek out opportunities to engage with other people (for me I've started volunteering at the hospital, about to start being a wellness coach for undergraduates, as well as random meetups (through meetups.com). I also just try to make friends with anyone who seems cool in classes which has worked out pretty well so far. My family's far from me and I didn't know anyone in the city I moved to for grad school so I have no shame, I'm happy to meet anyone)
I kind of agree, given what I know now about how much grad school sucks, that I wouldn't necessarily do this degree again, but at the same time I do think I'll feel proud once I have it so hopefully it makes it all worth it. I don't know if you ever really regretting furthering your education. As they always say that's "something people can never take away from you". I guess I'm just doing it more for myself than for career prospects? I'm curious to know what you decide though! Please do let us know. I think you should just do it, you're funded so at least won't add to your debt and you only live once so why not. It's a pretty cool thing to have that degree (I'm just trying to make myself feel better here too) http://justkeepswimming.blogspot.com/