Someone got a computer fully intending to use it for only proper things. But now, instead of doing that, this person is asking random people on the internet questions about the chinuch of his/her children, and halachic questions such as hilchos gezeilah! Should such a person break their own computer, so they will be more inclined to ask an actual Rav?
Destroying one’s own property is an Issur of Bal Tashchis. If a person’s property is causing them more harm than good (e.g. wasting too much time on the internet) then presumably it is Muttar for one to break their own property.
As of this posting, it reads you started this post about three months ago. By now the computer should be well on it’s way to being broken on it’s own accord.