It all depends on which countries you are counting. Trump is much more popular than Obama ever was in Hungary, Poland, Slovakia, the Czech Republic, and all over Eastern Europe. He is way more popular and has more influence in Israel, Egypt, Saudi Arabia, Jordan Kuwait, and all over the MidEast.
More important than popularity is respect. Obama was widely disrespected. China humiliated him, but rolled out the red carpet and more for Trump. The President of the Philippines called Obama an SOB, but had nothing but praise for Trump.
Basically this article is trying to use a vague generalization that may apply in a few countries to mask the truth that Trump is doing much better than Obama in many specific countries and regions and more widely respected virtually everywhere. Even more important, American foreign policy is no longer being run to gain favor with foreign internationalist elites, but rather for American interests first. That may be unpopular with those who having been taking advantage of the US, but he was elected to do more to stand up for America.