My dear , Srila Prabhupada nicely explains how the Mayavadi sannyasia falsely renouce this material world:
"When a person fails to become the
Lord of the universe it is like the sly fox who attempts to taste the grapes and failing to do so says the grapes are sour. The Mayavadi sannyasis are frustrated beings in their attempt to enjoy the world, therefore they say the world is false or the grapes are sour. The world is not false, Krsna is the Supreme Truth and the world is His energy, therefore the energy of the supreme truth cannot be false; but we must know that this energy is inferior to his spiritual energy."
Devotees see that this world is real even though it is Lord Krishna's inferior material energy. Therefore they engage things of this world in Krishna's and thus transform them from matter into spirit and become full of bliss even in this miserable material existence.
Sankarshan Das Adhikari.