Why no serious effort to strenghten ties with Russia?

While what you say ir true to some extent, what also is true is that we need the army and a strong army at that. US and other countries are not going to help us if someone attacks us. The attack could come from India or some other country. There are no permanent friends and foes. Our current friends could be temted if we don'y have means to protect ourselves.
ISI is a different issue. While I do think that ISI officers who do their own thing and are hurting the country should be weeded out, but dismanting the ISI is not a solution. Intelligence act as eyes in case of conflicts and otherwise. The solutions suggested by you are not practical and look more as an act of revenge against the army and ISI. These 2 institutions are the backbone of our country and will remain so for foreseeable future.