Have you noticed the Lᴏʀᴅ has a way of being more direct than we might be comfortable with Him being? Questions that go to the core of the matter.
The God-question of Jeremiah 2:5 is a challenge to face honestly the way Israel had come to live casually before God, claiming to be His people but also serving their own traditions, gods from surrounding nations or simply doing their own things. Maybe some had considered that God had not lived up to His promise to their ancestors of a ‘land flowing with milk and honey’ but that would have been a one-sided consideration omitting the obligation of Israel to walk true to the Lᴏʀᴅ, have no other gods…
Do we moderns engage in such one-sided debates against God when we seek to self-justify the casual relationship that we might seek with God? How often do we excuse ourselves from wholly walking in His footsteps so that we may be who we think is better than the God-likeness He has for us. God’s rhetorical question has no appropriate response as we can’t justify the ‘wrong-ness’ we promote as our excuse for going our way rather than God’s. Anything we would do rooted in our quest away from God for the ‘good stuff’ could only result in worthlessness.
Let us admit what is worthless and embrace only that worthy of identification with God.