Does Almighty Allah forgive injustice against the rights of His servants, or does He hold one accountable for it by taking the wrongdoer's sins and returning them to the wronged, and what is the interpretation of the noble verse: "Indeed, Allah does not forgive association with Him, but He forgives what is less than that to whomever He wills"?

Allah does not forgive polytheism (shirk), but He forgives whatever is less than that to whomever He wills. The rights of servants are not forgiven except through repentance or by the waiver of the right-holder. The bankrupt person on the Day of Resurrection is he who comes with good deeds but is then held accountable for the rights of servants. His good deeds are taken, and if they are exhausted, then some of their sins are taken and cast upon him, and then he is cast into the Fire.