How often I have brought a similar charge to lay at God's feet, verbalized or silently. When circumstances get to the point where I feel like I am in far beyond my ability, when relationships are challenging or stale, when long-standing situations seem stagnant - then I accuse God, like a petulant child.
What I do not do is wait - trustingly wait. Believe and watch.
God answers Moses, not with a rebuke but with an affirmation of his own character, "I am the Lord." He bookends his reply to Moses with the assertion of who he is, because He is the reason we can believe, we can trust and we will see his deliverance. Even when Moses reminded the Israelites of God's character, "they did not listen because of their discouragement and cruel bondage" (6:9); that did not deter God.
My moments of discouragement do not discourage God - He reminds me to lift my eyes to his unchangeable self and to still and quiet my soul "like a weaned child with its mother" (Psalm 131:2). For He does not change - He is.
Thank you, Father.