Suicide
It is up to Allah to decide this. He is merciful and just. He owns all of us and He can do anything He wants, there is nothing against justice about this. Him asking from us to take test is a favor, a favor that makes accountability even more valid. But reality is, the person who is afraid to fail the test is very likely to be forgiven by Allah and send to Paradise rather than be destroyed. Although mercy-killing is an option according to Ghamidi Sahab, just not guaranteed or something you wanna bet on. Allah prioritizes one’s salvation, not destruction. It is the one who does not think about these things that is likely to fail the test (such a person is likely to live a life being rebellious to God and causing pain to many) and that person will not be in a position to ask favors from Allah due to how angry Allah will be with them and how people he wronged will be demanding for justice. In that case, destruction is not an option, they must pay for their crimes. But even then there is a chance, Allah might relent and reduce/cancel the punishment but don’t count on it. Better to make effort now and avoid Hell, this will solidify meeting Allah on favorable terms.