Pain is a distressing feeling often caused by intense or damaging stimuli. The International Association for the Study of Pain's widely used definition defines pain as "an unpleasant sensory and emotional experience associated with actual or potential tissue damage, or described in terms of such damage". In medical diagnosis, pain is regarded as a symptom of an underlying condition.
Allah (SWT) never gives pain to any one to make him suicidal, but He grants continuous bounties and orders Justice and fairness. Remembering Allah (SWT) is the origin and the source of peace of mind. People suffer when they go away from the justice, fairness and neglect remembering Allah. Sufferings of people is the result of their own bad deeds.
Suicide is a major sin because it come as a result losing hope in Allah's mercy as well as sinful killing. Mercy of Allah is greater than any problem, and no problems whatsoever gig or complicated can be bigger than Mercy of Allah.
Part of the responsibility of a leader is to know what is happening to his people. This is especially true for a divine leader (prophet, Imam).
Not all human beings have the qualities necessary to be good leaders. Some people have the social, intellectual, and emotional capacity, foresight, initiative, wisdom, and planning and communication skills to be great leaders. Most people do not. But that is ok, because we only need a handful of great leaders.
So, bearing this burden might be very difficult for the average person. However, the Imam is not an average person. Allah would not give the Imam this responsibility if he did not have the ability to bear it, as Allah says in the Qur'an that He does not burden with something beyond their capability. Because the Imam is at the highest level of spiritual perfection (as well as intellectual and emotional perfection), he has the capacity to handle many things that regular people cannot. Also, when people are truly at a high level of faith and have a deep and sincere connection with God, this enables them to bear things that other people cannot.
Still, of course, we should try our best to give the Imam a good report about our deeds and circumstances, and try to work as hard as we can to improve things around us!
Torturing or harming animals is not allowed in Islam as we have Hadeeth that a Muslim woman will be punished because she tortured a cat and kept it hungry.
Drug testing can be to save life of human beings but some times it is not for saving life.
It is allowed to use animals in drug testing if it was related to saving human life, but every effort must be done to minimize the suffering of the animals.
This is a big question - many people have challenges in their personalities or temperaments that are long-term projects to work on. However, here is something that you could consider and see if it has any helpful advice ("Imam Ali and Islamic Anger Management by Shaykh Mohamed Ali Ismail")
(I recall he did a workshop some years ago at an Islamic event on practical tips for anger management but I don't know if it is available online; you could try to find it)
Also if you haven't already, you could look through books such as this: https://www.al-islam.org/jami-al-saadat-collector-felicities-muhammad-mahdi-naraqi
No it is not allowed. Even if it is considered in some countries as
legal, that does not make any difference because it is an intoxicant
and every intoxicant is Haraam (forbidden) in Islam and the change of the laws will not change our religion. Many countries consider alcohol as allowed
although Islam has forbidden it. We abide by the rules of Islam
wherever we live. ‘There is no cure in any intoxicant’ as the Hadith
from Imam Ja’far As Sadiq (AS) states.
Any act which causes pain to any one else ( except the enemies of Allah) is forbidden and Haraam.
Being good to your spouse is one of most important duties in Islam.
If any recommended act cause pain to your wife, you should not do it, because avoiding Haraam is before doing a recommended act.