Much of what Chabadshlucha says about our times is true, some of it not, but it is really all totally irrelevant.
The Rambam she is basing on is talking about when Moshiach has already been declared and all the Yidden have gathered to him, as he writes in Hilchos Melachim perel 12 …בימי המלך המשיח, כשתתיישב ממלכתו ויתקבצו אליו כל ישראל .
We are not at that stage, and from the Rambam there is absolutely no indication that even immediately prior to that stage the world will be a better place than it ever was.