The concept of an omniscient, all loving and fair/just God in islam is very contradictory
How is it fair for a Just God to send the final critical message to one specific region on earth? A person's religion is almost entirely decided by where they are born. Muslims condemn Jews acting entitled that they are the chosen people by god but the logic applies to muslims on a broader scale.
If god already knows the future, he knew exactly what culture and religion a person would be born into before creating them. Punishing non muslims with eternal hell for shirk means god is punishing them for a destiny.
Muslims claim Qada and Qadr are like different branches on a tree, and we use "free will" to choose a branch based on faith. But when we ask hard questions, we get that we kurang iman. It makes no sense for a loving god to punish us for exploring different paths when he created the possibilities.
If this Allah is all powerful and Islam is the divine religion and way of life for all humans, then why is his religion so easily weaponized by flawed humans? Calling it a TEST contradicts the idea of a loving creator. A truly loving parent guides and holds their child. They don't leave a 1400 year old book and go silent while humans continue to evolve.
The bigger picture is a humanised God
We are told god is perfect, yet scripture constantly gives him human traits like anger, disappointment, and a need for praise. A perfect creator should not have a need to be worshipped. Needing validation makes a deity look insecure.
Look at the universe: stars are born, shine beautifully, then eventually swallowed by black holes. There is creation, suffering, and destruction happening all at once. So god probably isn't a parent or judge, it is a neutral cosmic engine/deity driving a cycle.
An “evil” deity need to destroy things forever. To do this, it must also create constantly. This deity is totally unaffected by the destruction, gaining and losing nothing. Therefore, it isn't actually evil. It is just completely indifferent.
Ultimately, if this all loving Allah exists, he would not allow his creations to suffer eternally in jahannam. And if the creator of the universe is actually just an indifferent cosmic engine, then human worship is entirely pointless.