You make too many assumptions, one of them being I want to enter paradise. I don´t want to enter paradise if it means I have to sell who I am. But that hell is the alternative is just plain wrong. My issue is not that you are let in and I am not, even though that is unfair if it is based on faith I don´t care that much about paradise anyway, my issue here is with hell and hell alone. It is black and white. It is cruel, unproportonate, sadistic, pure evil, merciless... it should not even be called a punishment, it comes to another level due to its eternal nature. Hell should not exist, because it is an abomination against all that is good in this world. I simply care too much about my fellow man, I have too much compassion, to not find hell disgusting.
And I am not ungrateful, since for one I don´t ask anything from Allah and second I don´t know what he has done. I only have your word for that he has done everything, just as I would have the word of other religions of what their god(s) have done for me. If I believe Allah does not exist, which I do not, then I am not ungrateful more then I am ungrateful to someone who managed to save my life without me finding out.
Does this means it does not matter if you are a so called "disbeliever" to if you go to hell or not?