"The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance."(2Pe 3:9)
As brought out in another study, the whole reason for the "Law of Moses" was to demonstrate the perfection of God, and also to show the imperfection of man. The imperfection of man translates into him being a "sinner" (sin being the transgression of the law) and, as such, subject to the penalties laid out in "The Law". The "law" calls for a blood sacrifice to purge away sin. Hence the rituals and ceremonies found throughtout the Old Testament. These only being a shadow and illustration of the true repentance.
Jesus, God's Son, came here of His own free will, lived amongst us, was humiliated and finally died a horrific death in order to fullfill all the conditions laid out in the "law" for redemption of sin. This He did once and for all, putting behind Him the law of ordinances. "Having abolished in his flesh the enmity, even the law of commandments contained in ordinances; for to make in himself of twain one new man, so making peace."(Eph 2:15)
So great is His love for us that He came and took our place on that cross and paid the price of sin in our stead. Now, all that is asked, is that we accept His blood sacrifice and ask for the free gift of redemption. Still, as simple as it is, there are many who will not bow their heads in a voluntary humility and humble themselves in light of such sacrifice. This is, of course, their decision to make. The majesty of choosing one's own fate lies solely on the head of the author of this decision. Now if someone chooses to not accept the gift then that is their own responsibility; the rules are set out, the methods are plain and simple, all that is missing is the excercise of one's faith in accepting the conditions that God Himself has established." The LORD is longsuffering, and of great mercy, forgiving iniquity and transgression, and by no means clearing the guilty..."(Num 14:18)
There was a time when the Gospel was not well published and that ignorance was somewhat of an excuse, but this is not the situation we are in today. The Bible has been published in about every known language on Earth and even a few not so well known ones. " And the times of this ignorance God winked at; but now commandeth all men everywhere to repent."(Ac 17:30)
There is great reward in accepting God's Plan, as He knows what is best, although in order for it all to work, even He has limited Himself to our majesty of choice. We have seen that it is not His Will that any should perish, but if they choose to go away and surfer the consequences, then there is nothing anyone can do. "The LORD is good unto them that wait for him, to the soul that seeketh him. It is good that a man should both hope and quietly wait for the salvation of the LORD."(Lam 3:25-26) Even God can't do anything if the person, of their own free will and volition, decides not to submit and to go the other way. It is, after all, their decision to do so.
So, the short answer to the question of, "Who sends you to Hell ?" is a rather simple one : You do. It doesn't have to be that way, but the choice is up to you.