You are assuming there is a god. You are assuming that if a god exsists, this god wants to send cowards to hell, you are assuming that there is a hell. Also, you are equating cowards to shy, sensitive and easily embarrassed type of people. Your question is rather biased and assuming.

Your question comes from a false perception of who and what God is (IMHO). God "sends" no one to hell as we ALL are perfectly capable of creating Hell (or Heaven) ourselves!

Being shy, sensitive, or easily embarrassed is not the same thing as being a coward. A coward is someone who knows he has absolute overwhelming moral DUTY to do a thing, but does not do it because he is afraid of the consequences to himself. In other words, his sins are self-love (over and above his love of God, righteousness, and all other people), and faithlessness (failure to trust in God, that God will deliver him from - in the next world, if not this one). Ultimately, courage is the most important of the virtues, as it is the one virtue on which all the others depend. Likewise, cowardice is the greatest of vices, because it undermines and even corrupts all other virtues, rendering them useless and even sometimes enlisting them to the service of an evil end.

Addendum: I don't think God wants to send anybody to Hell. It's just that in the world to come (the new Heavens and the new Earth) there's no other place for the corrupt and unregenerate: pride, faithlessness, and self-love would destroy the very harmony that God would establish -- just like they did the first time.

Men have conceived a supreme deity, and gave this deity the name "GOD" and came to believe that this deity requires slavish service and worship. But here's the thing. Men also perceived this deity(God) to be an "Infinite Being". "Infinity", however, is something inherently impossible for us to comprehend thus utterly beyond our human cognitive limitation to define. This being so, any attempt to define God, who we believe to be "Infinite", is then presumptuous and self-deceptive. If this God possessess a non-emperical nature, infinite wisdom and power beyond our "finite" imagination, then we couldn't possibly explain IT. If we could describe and explain in such a simplistic way this "Superior Being"--transcendental in power and intelligence--and if we could ascribe to this "Superior Being" our own human attributes and characteristics; down to the pettiest things such as favoritism, preference, bias, specific gender, hue, anger, etc, then it would be no reason and would make no sense to believe that this "Superior Being" is transcendental or in any way superior to us. The truth is that we don't really have a true understanding of the concept of that which we call "God" and we are only pretending we do by filling the void with the most perplexing and astonishing concocted fables which could never shed--not even remotely--true illumination on the narrow ideas, ideals and concept of men about their "Maker". Just for the record, my argument herein is not whether or not there is a SUPREME SPIRIT. My conviction--not a "belief"--that there's a Divine Living Intelligence is unquestionably strong and it has already been established. For I'm convinced that the existence of the universe necessitates a preceding cause, and this cannot be "inanimate matter" for the latter does not possess the qualities of living things. Howver, there's not one religion--and more so what is known as Christianity--which could provide any genuine seeker with a [rational] and comprehensive concept of the Divine Spirit many believe to be a deity. Theology is but a conflicting and nonsensical byproduct of men's vaine effort to try pierce the mistery of the Ultimate Reality.

Before asking a question like that, make sure you read the bible. That's where all the answers are.