“Today, the Lord wants us to feel ever more profoundly His great mercy,” the Pope said… We may think that we are the “worst” on account of our sins and weaknesses, the Pope told the youth. However, this is how God prefers us to be, in order that “His mercy may spread.”

I can’t find an official transcript of this off the cuff remark, so let’s just go with the CNA version. Such a short and simple statement, yet so many levels of error.
First and most obvious, God does NOT prefer us to remain in our sins and weaknesses. Law of non-contradiction, hello?  Sin is that which goes against God’s will.  Francis’ statement reduces to “God’s will = not God’s will”. So no, that doesn’t work.
Second, if WE prefer our sins and weaknesses over the will of God, it isn’t so that “his mercy may spread.” On the contrary, our refusal to repent and continued disobedience cuts us off from that mercy on our own account. It’s just another example of twisting the truth to the point of a complete inversion of truth.
In order for Francis’ statement to be true, think about what also would have to be true.  It would mean the Non Serviam of Lucifer and his angels was not of their own free will, but that their sinful act was actually willed by God. It would mean the Original Sin of Adam and Eve was not of their own free will, but their sinful act was actually willed by God. And it would mean the transmission of Original Sin down through the ages, its resulting Concupiscence in all of mankind, causing all of us to tend toward sin against God’s will, is actually willed by God.
None of this is Catholic.  But as I have written before, all of it consistent with the constant ramblings of a man so lost in his sins, he doesn’t think it humanly possible to resist any of them. No, what we have here starts out as pure Luther (who was also totally lost in his sins), then dovetails into a Calvinistic Total Depravity, where our free will is completely subjugated to sin. Simply, we are incapable of doing the right thing, so don’t worry, be happy.  This. Is. Heresy.
The total depravity angle has the added benefit of firing up Francis the Insult Machine whenever his comments turn to faithful Catholics.  Because in his mind, there are no faithful Catholics, only hypocrites. The false doctrine of total depravity, taken to its logical end, teaches that ALL of man’s actions, even good actions, are inherently evil because our motivation for doing good cannot be altruistic but rather must be egotistic. So you can take all your beads, counted rosaries, novenas, Masses offered, and get off your high horse.
Lastly, the final diabolical inversion at play here is truly sinister.  In fact, it is an example of Francis treating us worse than Satan treats us.  Oh yes.  When we make some effort to amend our lives, and it goes very badly, as it tends to at the beginning, Satan attacks us by telling us we are miserable pathetic failures and that God will never love us.  His aim is despair, followed by your abandonment of the effort.  Francis attacks us by telling us we are wonderfully blessed by our successful sinning, and that God loves our sins.  Do you see how much worse this is?  By the way, his intent doesn’t matter (except regarding the degree of his culpability).  Whether it is willful or negligent is immaterial to the effects on the ground.  It is still an attack, an attack on souls.
Friends, while we cannot expect to live sinless lives, this is exactly what we must strive for.  At every instance of temptation, God offers sufficient grace to offset the concupiscence, providing us the ability to choose the right action.  Every sin we commit happens because we choose to refuse the grace being offered, and instead choose our will over God’s will. This is what Catholics believe.  Be perfect, therefore, as your heavenly Father is perfect.