What I find rather difficult is when I know I should be enjoying myself but I can't because I'm stuck in hell observing from the other side of a window or a wall or something. Seeing the good but not being able to enjoy it is misery.
Yes, this is when it seems like there is no point in hanging in there.
To me, if you aren't enjoying yourself in life then there is no point in being here...but that is not the best way to think when in that headspace.
I know the feeling though, and having previously loved and enjoyed my life so very much, it was a very difficult pill to swallow, not being able to any more.
The fact is, it is YOUR life, and you have the power to choose whether you want to be here or not...it's no one elses business.