A lie mixed in with truth is still a lie. You have it mostly correct. Let's begin.
#1 To truly follow the 10 Commandments (not suggestions), you cannot hate your brother. The Law is based on LOVE. The first four is our duty to God, the rest is our duty to fellow man.
The Law of the Lord is perfect, reviving the soul. Ps. 19:7. You say it is imperfect.
Gods Laws are eternal, pure and just. Ps. 19:9.
The Laws were written in stone to signify they are permanent. Not paper which can be easily destroyed or nailed to a cross.
WHAT laws are written in our hearts if not Gods Laws which He has commanded us to follow? If we follow our conscience only (as you say) without this compass of right and wrong . . well there is a way which seemeth right to a man, but the ways thereof are destruction.
Jesus was the only one that was able to follow the law. No one else can follow it perfectly. It is not the law that is imperfect, but we who are not able to follow it perfectly. A lot of people assume that by following the law of God that the sinner can mitigate his deserved punishment by his own efforts. For some this may be through religious activities, such as church attendance, baptism, contributing to the offering, and doing good deeds. While many agree that “nobody’s perfect,” the law requires it. Some may say that God in His “grace” will overlook our sins if He sees that we have made a genuine effort to do the right thing, mend our ways, and “follow the rules”. This belief contradicts the true meaning of grace, which is unmerited favor.
We are saved by grace, not by a mixture of God’s grace and our meritorious works. All of our righteous deeds are as filthy rags (Isaiah 64:6). Even considering our best efforts, we have fallen short of God’s standard of righteousness (Romans 3:23), and we deserve death (Romans 6:23). We are not commanded to “do our best” for God but to love Him perfectly and completely (Matthew 22:37). We fail in that. The command is not to “try” to love our neighbors but to actually succeed in loving our neighbors as we love ourselves (Matthew 22:39). Under the Commandment “do not murder” our duty is different than the love God expects, and we are unable to give, outside of of Christ. Jesus expects more from his own than is humanly possible.
“Gods Laws which He has commanded us to follow?”
This is problem. “For all have sinned, and come short of the glory of God;” (Romans 3:23)
20Therefore by the deeds of the law there shall no flesh be justified in his sight: for by the law is the knowledge of sin. 21But now the righteousness of God without the law is manifested, being witnessed by the law and the prophets; 22Even the righteousness of God which is by faith of Jesus Christ unto all and upon all them that believe: for there is no difference: 23For all have sinned, and come short of the glory of God; 24Being justified freely by his grace through the redemption that is in Christ Jesus: 25Whom God hath set forth to be a propitiation through faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God; 26To declare, I say, at this time his righteousness: that he might be just, and the justifier of him which believeth in Jesus.
So, here is the problem, we are commanded to follow the law, but it is impossible to follow the law. What are we to do? All are sinners and unable to follow the law. God provided the answer in his Son, Jesus. (see Romans 3:20-26 above for the answer)