Is malefic Mahadasa so bad that a person cannot yield anything good ?

God’s astrology has given good dasa period and bad dasa period. The good and bad period are designed in such a way that no good period goes thru 100% good time. It could be 65% good and 35% bad time. Its because if a person goes thru 100% good period then he would develop ego and that ego will make him devil. So to keep in check of the human behavior, a person in his good dasa period don't have full dasa of good period.

Same with the person going thru bad dasa period will not get 100% bad period. He will get 65% bad and 35% good period. God has designed the period in such a way that the person will suffer but will not scumble down. If a person get 100% bad period then he will not live in this earth. Then the earth will be with half population as people with bad period will not exist.