Well this gets you added to the God blasphemer list for claiming that God does things for no good reason when Scripture plainly identifies that He does things for His own good pleasure. But we already know you don't believe what the Bible says.
Maybe you should actually read the Bible.
It is time:
Do you realize that one of your favorite verses to quote was all about?
Jeremiah 17:9
The heart is deceitful above all things
and beyond cure.
Who can understand it?
That verse was spoken to Jeremiah by the Lord.
Why?
Jeremiah's woman had abandoned Jeremiah.
She gone off to the phallic cult orgies that were taking place in the high places in Israel.
High places where the rebellious Jews had been performing child sacrifice and pagan sex rituals.
Rituals that God forbade the Jews to partake in.
God in essence, said something to Jeremiah more like the following.
Which was spoken to the deeply heart broken Jeremiah.
For his unrepentant ex fiancé was embracing all the promiscuity and degeneracy with the sex orgies.
Here is what was communicated by the Lord to Jeremiah.
It was concerning his ex woman and the people who become addicted to the pagan sex cult.
It should red more like this!
The deceitful heart is above all things is beyond cure.
Who can understand it?
Jeremiah could not make sense of how she and the rebellious Jews could be thinking like they were.
The Lord was stating to Jeremiah that she had entered into a form of insanity due to her perverse obsession that the phallic cult
produced in her, and the Jews doing the same!
Here is more like what was being said...
The deceitful heart is above all things is beyond cure.
Who can understand it?
Because of their deceitful hearts?
Israel was about to be destroyed by Babylon by God's judgement of Israel who had fallen into cultic degeneracy.
The cultic practice caused people's minds to become DECEITFUL. Beyond understanding!
And... they became beyond cure!
That was why Nebucanneezar's army would be invading and slaughtering many of those Jews in God's judgement of the people.
There you have it.
Quite different when what we only have is only a translation into English with no explanation given for what was being said..
A translation that gives no historical background for why something was written.
Now?
If interested?
Order the Jeremiah series.
https://www.rbthieme.org/index.html#tabs-3
149 hours of rare and excellent exegetical expository teaching.
149 hours that will cost you nothing if you wish not to donate.
It will be sent anyway.
grace and peace ........