I don't want to acknowledge it, but the mistakes that come from my own youth are inexcusable.
(Note: The original Japanese sentence seems to be a reflective statement about not wanting to admit one's own mistakes due to youthful arrogance or immaturity. The first part of your request appears to be related to a model kit (MSN-04-2 Nightingale), but the second part is a separate philosophical reflection. Let me know if you need further clarification!)
For the product description: "Stick-making MSN-04-2 NIGHTHINGALE Nightingale (Many pictures)"