From talking to friends, most stopped "loving"* Obama years ago shortly after there was no visible difference to Bush in foreign policy, human rights, wars, etc.
* (the only President Germans loved is probably Kennedy, the most misunderstood Reagan)
* (the only President Germans loved is probably Kennedy, the most misunderstood Reagan)
Anyone who has fallen out of love with Obama probably wasn't looking hard at him in the first place.
Of course the actions by the administration were more constructive than the rhetoric but I certainly grew up in fear of imminent nuclear war.