A very common tactic of Shaitan is to make a person lose hope in Allah because of the injustices he/she is made to face at the hands of people.
But Allah taala was never the one who caused those people to be oppressive. Infact He's clearly stated:
"O My servants! I have forbidden oppression for Myself, and I have made it forbidden amongst you, so do not oppress one another." (Muslim)
He has conveyed to us through His Messenger صلى الله عليه وسلم that He is on the side of the oppressed under all circumstances:
"Beware of the supplication of the oppressed, even if he is an unbeliever, for there is no barrier (between it and Allah)." (Musnad Ahmad)
For the very cause of justice He has kept a day when "the excuses of the unjust will not benefit them." (Ghafir: 52) The day both the oppressor and oppressed will be given what they deserve.
Remember, *it is people who oppress*, not Allah. So never let Shaitan break your connection with your forever partner through the journey of life, dearest Allah taala, because of something someone else did.