1) Lincoln did not free the slaves in the union, nor did he attempt to.
2) The pressures of war production compelled more and more appalling and dangerous conditions in northern factories. Lincoln had no problems with the exploitation of children. Even though he had little authority in this area, he did not hesitate to act in areas where he had problems.
3) Although the Union did not enact a national draft until March, 1863 Pennsylvania enacted a state draft in 1862 because it had been unable to meet its quota through voluntary means.
4) The fatality rates in the civil war are widely published and acknowledged to be in excess of 700,000.
5) Lincoln was not universally admired. Had he not achieved martyrdom he would be more objectively percieved by history.
I believe that you are wrong in that. Lincoln was a strong supporter of what would become the 13th Amendment ending slavery. He supported in the the Senate, was instrumental in having it added to the 1864 Republican platform, and pressed for the House to pass the Amendment when they convened in December 1864.