What parts of Hamlet's soliloquy support a more negative outlook on life?

"... Tis nobler in the mind to suffer" ... Is negative as it explains life is suffering one has to be able to tolerate.

" ... that makes calamity of so long life ... "Again Hamlet feels that a life of misery is too long to bear.

" ... for who would bear the wips and scorns of time ... "One is beaten and it is also disdained in this life, while it lasts it is hard.

" ... To grunt and sweat under a weary life ... "A person has to groan in pain after making terrible efforts to live.

" ... But that the dread of something after death,

The undiscovere'd country, from whose bourn ... " In these lines he expresses that death may be worse than living as nobody knows the place. He prefers, may be to live under such distress than experience the after life.

... "Thus conscience does make cowards of us all ... " Being aware of certain facts makes us all fainheart in a way.

With the words stated, it is clear that at the moment of speaking, Hamlet has a very negative outlook on life.