Psalm 37:23 in the NASB:
The steps of a man are established by the LORD,
And He delights in his way
This certainly does sound like a statement to the effect that God exerts substantial, and possibly total, control over the will of man.
Here is the same text in the NIV:
If the LORD delights in a man's way,
he makes his steps firm
A very different statement it would seem and one that would seem to be far less suggestive of God's complete control over the will of man.
Now to be fair, I have been led to believe that the NASB is a more "accurate" translation than the NIV.
So let's go with the NASB. Consider also Proverbs 16:9 also in the NASB:
The mind of man plans his way,
But the LORD directs his steps
This text certainly seems to draw a strong separation between the acts of men (planning the way) and the acts of God (directing the man's steps). Things are therefore not as "simple" as they are represented as being.
Both texts agree strongly imply (on a "plain / literal" basis) that the "steps" of men are controlled by God. The Proverbs 16:9 text seems equally to suggest that man acts as an agent somewhat disconnected from God - the use of the term "but" seems to underscore this distinction.
Can it be claimed that the "mind of man" as expressed in Proverbs 16:9 is really under the control of God and therefore not at all "free"? Of course, this can be claimed.
However, once one does this - once one opens the door to a reading that trumps the "common-sense / plain / literal" meaning - then one has to open that door in respect to all texts. One cannot simply claim that Psalm 37:23 (as rendered in the NASB) supports God's full determination because its plain wording states "The steps of a man are established by the LORD".