Philosophical Pessimism vs. Stoicism If for example you consider boredom, loneliness, hopelessness, embarrassment, and so on pains, then you would have to rewire our bodily structure so fundamentally that our existential structures would be completely revamped, to the extent that we might not be able to even recognize them or from our present perspective even imagine them. — The Great Whatever
Or, you could look at these pains like I do, and realize that they are self-caused. Boredom can be relieved and can be a motivator for action. Loneliness and embarrassment are horrible feelings but they ultimately can be relieved as well by action from the person. Striving,
tanha, can be mitigated by getting rid of three different kinds of desires. It's not as if these pains spontaneously come into being and cannot be solved.
Additionally, I do not think these kinds of pains are anywhere near as bad as, say, being stabbed in the heart. They may cause a person a bit of angst, anxiety, and some depression, but don't usually give a person overwhelmingly terrible suffering. And the times that it does give a person overwhelmingly terrible suffering (such as extreme anxiety, something I have experience with), there is medication and therapy that helps tremendously.
Is it even possible for a feeling creature not to suffer? — The Great Whatever
We could make an artificial intelligence that is wired so that it never thinks about the past or the future (thus never feeling existential angst), and program it with notifications instead of crude nociceptors.
For beings that exist right now, such as you and me, well, I'm not sure. Unless an experience machine is a valid option, then some kind of existential, psychological suffering (like you said, boredom or striving) is going to arise. It is inevitable, but we can learn to deal with it in various ways that allow us to live our lives in a sufficiently pleasant way.