Of course Allah swt cares for dunya. He has created dunya for us and provided everything we need in dunya in the most perfect way. However, dunya is just a temporary place and not our final destination.
Therefore we must not attach our heart to dunya as this is the place of struggle, testing, calamity, illness, death, hunger, thirst and desperation. Of course there are many positive things in dunya as well but everything in dunya is not lasting.
So compared to the next life in the Hereafter, which is the real life, were there is no death and where a believer is rewarded for his deeds with eternal bliss, inshallah, dunya is a bad place.
The Prophet said: Verily Allah revealed to the world, 'Tire and wear out the one who serves you, and serve the one who rejects you.'[Amali al-Saduq, p.230, no.9]
Thus, it is a good place when we use it for self-development, learning and helping others and do not strive for its pleasures and be occupied by accumulating wealth or gaining power but be always aware that we must leave this world sooner or later.
The one who attaches his heart to the world has attached his heart to three things: endless worry, false expectations and unattainable hope.[Imam al-Sadiq, al-Kafi, 2, p.320, no. 17]
We must Ask ourselves the question whether we have used our wordly life to gain in the Hereafter or have we wasted the time which was given to us and lose.
The bigger the trial, the bigger the reward - that's only fair. The one who put more effort into something, spent more time and energy, sometimes even his life, needs to be rewarded more than the one who did less in all of this.
But this does not mean that we should be sad when our life is not full of difficulties and misery all the time. Everybody has a different ability and capacity to cope with calamities and bad times, therefore Allah swt tests each of us differently, according to our ability because He does not want to break us but He does want us to develop in His direction. And even good times or a lot of money and success can be a test. Do you become arrogant or greedy because of your wealth or good job position or do you share your money with the less fortunate and help your colleagues to succeed as well.
The most important thing to remember is, that we must always thank Allah for what He has given us, no matter good or bad.
