Amnesty International still considers the US worse because we have the death penalty. Russia does not (unless of course you are a journalist that crosses Putin).
Also, prisoners of war are much better treated as prisoners of the American military then by any others.
A couple things: First, my dad said his last duty in WWII, just days before the official end of hostilities, was to sit out at an airfield in Germany. Prisoners coming in, were escorted to the officers in charge of the operation. The word went out to whomever wanted to ‘come in’ just EXACTLY how to approach and what to do.
Dad said the field was swamped around the clock... everything that could fly and some things that only a miracle could have got off the ground, came in there. (He said some planes were so damaged that you could see daylight through the fuselage). EVERYONE wanted to be US prisoners. Some of the men flying these ‘aircraft’ were not even pilots, had commandeered aircraft and barely got themselves landed in one piece. They brought friends, relatives, non military personnel and girlfriends, etc. out with them.
Secondly:
At the end of hostilities in Korea, the UN held many thousands of prisoners. Much of the delay in concluding the peace (such as it was) was because MOST of the people held in the UN camps expressly stated they did NOT want to go back. They were in better health, gained weight, had their wounds properly treated, etc. They knew that, in the UN camp, they lived better than they EVER had in their lives or EVER WOULD again!!!