There is Biblical Soteriology, which is the true understanding of God's salvation program and then there are perversions of it.
The Arminian perversion exchanges the sovereignty of God and transfers His power to fallen man.
The hyper-Calvinist perversion removes the responsibility of man in salvation and transfers all responsibility to God.
Arminianism makes man god and God a powerless but concerned by-stander.
Hyper-Calvinism makes man a puppet and God the author of sin.
Arminianism holds that everyone is commanded to repent and believe, therefore (using human logic and ignoring Scripture) all men must be able to repent and believe, on their own. Therefore, the decision to believe or not resides within each person, God is helpless and cannot interfere with human sovereignty (called "free will", meaning free of God acting upon men). In the Arminian world, God must love everyone, Christ died for everyone, redeemed everyone, was the propitiation for everyone, removed the sins of everyone, made everyone "qualified" to enter heaven -- if they will accept the work done by God, else that one sin (apparently unpaid by Christ in some manner) puts them into hell. Thus, it is only the sin of rejecting (the Holy Spirit) that sends anyone to hell, or so they believe.
Thus, Arminianism is a schizophrenic soteriology, the Arminian claims Christ took away the sins of everyone, then claims some will be in hell for sins not removed. They have Christ's atonement accomplishing nothing and the work of reprobate men in "accepting" Christ of their own free will, accomplishing everything via the power of man to activate the atonement. Thus, Arminianism is more than just confusion, more than just a lie, more than just not knowing what the true gospel is, it is blasphemy and a damnable heresy.
Hyper-Calvinism holds that all men cannot repent and believe apart from God, therefore (using human logic and ignoring Scripture) all men being unable are not required by God to repent and believe, God saves without evangelism. Using human logic, it would be unreasonable to ask people to accomplish a task (repent and believe) which God says they are patently unable to perform. The hyper-Calvinism fears stepping on God's sovereignty by demanding the unelected do something that God has no intention of doing (saving them). But, if God is truly sovereign (and He is), then there is nothing the preacher or evangelist can say or do that could upset or thwart God's redemptive plan anyway.
Arminianism fails because it rejects the Scripture truth that man is unable to repent and believe, that man is spiritually dead in sins. Man is a spiritual corpse, and cadavers do not repent and believe, they only rot. There is no free-will, man is not sovereign but rather enslaved to sin and in rebellion to the will of God. God is the only sovereign, He chooses and saves those He wills and those He does not save were not chosen to salvation and will not be saved. Because Arminianism rejects God as sovereign over His creation they find God's intention to NOT save everyone abhorrent and unloving. They fail to recognize that God is not required to save anyone, if God saved just one person from the penalty of their sins it would be perfect and just. Yet, He saves untold millions - and the rest remain in their sin to curse and mock Him.
Hyper-Calvinism fails because it assumes that God is unable to do two things: Regenerate (make spiritually alive) and bring the elect together to hear the evangelist's salvation message. The Hyper-Calvinist is making assumptions as if they knew the mind of God, which they do not. True enough, man does not have the ability to believe due to his spiritual depravity, but still God demands everyone to repent and to believe. It is a matter of reality, we are beings created in God's image, and such we are all called to believe what is true. God is not wrong to demand His creation see the right and do it. That they don't is judgement against them.