I am sorry to say, but it seems like you did not read more than perhaps one or two lines of the over 25,000 characters of Bible study written exclusively for you. If you did, then you would not say something like this as if it was new,

Adding ANYTHING as a requirement to salvation is denying the sacrifice of Jesus was not (you added the "not" but that is a slip of the tongue unless you meant to say "saying" instead of "denying") sufficient.

for that never was once insinuated in any of the three studies. In fact, even thinking to use works as a means to earn salvation, as if salvation could be earned as wages, was specifically rebuked. Dozens of verses of Scripture were all corroborated in order to show the purely Scriptural understanding of faith, works, obedience, and most importantly, love.

By this we know that we love the children of God, when we love God, and keep his commandments. 1 John 5:2

But your confusion, because perhaps you did read but do not quite understand the language that is used in the Bible, is in what law is being spoken of. Again, to reiterate, there is the Moral Law of the Ten Commandments, the civil law, and the ceremonial law. All of the theories that you conclude, and all of the grievances that you spoke of, are either found in the civil law, or in the ceremonial law. There is nothing grievous in the Moral Law:

For this is the love of God, that we keep his commandments: and his commandments are not grievous. 1 John 5:3

Now a king is not without his government, and a government is not without its laws. Again, if you lump in the civil and ceremonial laws with the Moral Law, which is what you are doing and what the Pharisees also did, then you are denying the law of the government of God. By throwing out the Moral Law with the civil law and the ceremonial law, you are throwing the baby out with the bathwater, and in this specific case, that means that you are verily throwing out Jesus. Knowingly or not, you are rejecting His position as King of kings, as Lord of lords, as Messiah, as Christ, and are doing just as what the large majority of the Pharisees did.

Then came to Jesus scribes and Pharisees, which were of Jerusalem, saying, Why do thy disciples transgress the tradition of the elders? for they wash not their hands when they eat bread. But he answered and said unto them, Why do ye also transgress the commandment of God by your tradition? For God commanded, saying, Honour thy father and mother: and, He that curseth father or mother, let him die the death. But ye say, Whosoever shall say to his father or his mother, It is a gift, by whatsoever thou mightest be profited by me; And honour not his father or his mother, he shall be free. Thus have ye made the commandment of God of none effect by your tradition. Ye hypocrites, well did Esaias prophesy of you, saying, This people draweth nigh unto me with their mouth, and honoureth me with their lips; but their heart is far from me. Matthew 15:1-8

If you truly seek a heart wisdom, a heart knowledge, and a heart understanding of what is written in the Word of God, then go back and prayerfully read through those three studies. Go back and discover the love of God as written in His Moral Law.

And Jesus, when he came out, saw much people, and was moved with compassion toward them, because they were as sheep not having a shepherd: and he began to teach them many things. He that hath my commandments, and keepeth them, he it is that loveth me: and he that loveth me shall be loved of my Father, and I will love him, and will manifest myself to him. Mark 6:34, John 14:21

Because keeping the Moral Law is the testament, even the covenant, of love.