It amazes me how many people completely miss everything regarding Tony's character in the comic, Tony is the most human character in the comic and is not the villain true he build a prison in the negative Zone and true he used nanite controlled villains but that doesn't make him the villain for one very clear reason, Tony is not the aggressor.
Tony tries to reason with everyone he never was looking for a fight, he didn't want the war and tried to negotiate every chance he got. Lures Steve's team out doesn't attack them all he does is ask Steve to hear him out for a bit and what does Steve do he attacks he starts the fight and the war Tony was trying to end peacefully. A man dies and Steve brushes it off declaring it a necessary sacrifice for freedom, when others don't want to fight this war and decide to leave Steve is cold saying if their freedom means so little to them let them go, that's cold. When Daredevil is being locked up Tony is trying to reason with him every step of the way, all but saying he doesn't want to have to imprison him, he's ignored again. Tony pays for the fallen heroes funeral builds the grave pays his respects everything, how is Steve more sympathetic in this particular situation?
Spidey is against the prison in the negative zone and Tony completely rationalizes it, they have nowhere else to put them where they won't escape instantly. Tony tries to reason with Peter telling him he doesn't like this but going back to the way things were before is not possible, and he's completely right, this is going to happen one way or another all the anti registration is doing is making things worse. He flat out says that if they don't come to terms with this change masked heroes might be just be outlawed altogether and once again he's not wrong.
In the final battle despite having them outnumbered at first Tony still gives them a chance to stand down Steve starts the fight again, Steve is the one who accidentally it wasn't deliberate takes the fight to a public city, Tony's the one ordering citizens evacuated, Steve is the aggressor, he starts every fight. What makes this even worse is Steve doesn't have a plan to win, the anti registration are just busting out captured heroes fighting bad guys and sitting around waiting for people to change their mind, which is never going to happen. They aren't accomplishing anything all they are doing is dragging the war out and making things worse.
Finally what the heck is Steve fighting for? The right thing, the will of the people what does that even mean where is his actual motivation, where is his proof that registration isn't necessary? Steve said they were winning everything except the argument the problem here is Steve didn't have an argument he had nothing nothing to convince anyone that registration wasn't necessary, nothing but his morals and you can't start a war over just your morals and only your morals. Tony has Stanford very clear evidence of what happens when heroes are unsupervised, he has motivation he was blamed for the Death of woman's son, he looks at the picture of that dead kid every day and that's why Tony is doing this in the memory of all those dead people, all those dead children. He's doing this to make sure nothing like that ever happens again. That's real motivation he does care about people in fact he cares about both sides and tries to reason with everyone he comes across, he never starts a fight.
Now tell me what makes Steve right what proves this isn't necessary how did the anti registration help at all? Tony was the only one actually trying to make things better and unlike Steve doubted every choice he made, every time he made a choice he questioned it. Steve never did he was convinced he was completely right aND never even considered the possibility that he wasn't. Also a lot of people forget this Tony worked with villains well guess what Steve recruited villains as well, he also worked with the punisher and beat him into ground after killing some villains that Steve was recruiting, so what makes Tony working with the villains worse.
How is someone who regretted every choice they made, who tried to resolve things peacefully and reason with people every chance he got and had a real reason for supporting his side less sympathetic than someone who was uncompromising who coldly brushed off a death and people's reactions to it and started every single fight even when the opposition was offering a more peaceful solution? With all this clear as day how is Captain America more sympathetic and human than Iron Man? (This is just the main series not the tie ins Front lines went way too far in depicting registration as the villains)