Now that it's over, they're criticizing him for letting Russia broker the peace agreement and participate in the peacekeeping force, and they're still complaining that NATO's generals were impeded by civilian leadership from effectively fighting the war.
They were not pleased that Russia spear-headed the peace talks at all. 
mnli hypothesis: They were not pleased that Russia spear-headed the peace talks at all.  premise: Now that it's over, they're criticizing him for letting Russia broker the peace agreement and participate in the peacekeeping force, and they're still complaining that NATO's generals were impeded by civilian leadership from effectively fighting the war.