4:29, And do not kill yourselves [or one another]. Indeed, Allaah is to you ever Merciful
True its on you and it does not affect the people around you, and it's your own choice, but what is your purpose in life? Why did god create us?
51:56 And I did not create the jinn and mankind except to worship Me.
Our mission in life is not to fulfill our desires and make life our entire concerns, rather it is to worship God and follow his orders.
23:115 "Did you think that We had created you in play (without any purpose), and that you would not be brought back to Us?"
We all face difficult times within our life but the beauty of it is that for each one of us we only have burden for what we are capable of.
2:286 Allah does not charge a soul except [with that within] its capacity. It will have [the consequence of] what [good] it has gained, and it will bear [the consequence of] what [evil] it has earned.
Every difficulty we face in our life's is only temporarily and not lasting forever no matter how long it is or how short.
94:5 For indeed, with hardship [will be] ease.
94:6 Indeed, with hardship [will be] ease.
What matters is how we react in such difficulties, after all we receive a judgment of how we spent our life's.
99:7 So whoever does an atom's weight of good will see it,99:8 And whoever does an atom's weight of evil will see it.
God has chosen to create you and give you life, what do you chose to do instead?? take that life away!! in another context imagine yourself feeding a hungry person and offering him food but rather he spits on the food, would that not make you furious.
Suicide is a major sin. The Prophet (peace and blessings of Allaah be upon him) stated that the one who commits suicide will be punished with something like that with which he killed himself.
Abu Hurayrah (may Allaah be pleased with him) narrated that the Prophet (peace and blessings of Allaah be upon him) said: “Whoever throws himself down from a mountain and kills himself will be in the Fire of Hell, throwing himself down therein for ever and ever. Whoever takes poison and kills himself, his poison will be in his hand and he will be sipping it in the Fire of Hell for ever and ever. Whoever kills himself with a piece of iron, that piece of iron will be in his hand and he will be stabbing himself in the stomach with it in the Fire of Hell, for ever and ever.” Narrated by al-Bukhaari, 5442; Muslim, 109.
What ever we do in the current life is recorded, we do good we will receive good otherwise we do evil and will receive evil, as stated in the above hadith the one who commits suicide will be punished by the means he committed suicide with for ever and ever, so would you rather end your life to even stay longer in misery and torture or would you choose to be patient and good upon difficulties to only receive good i the hereafter.