He'd rather die than lose his dreams, hence he's more scared of losing his dreams than dying, I thought it was obvious, wasn't it? He was panicked and shocked when he found out how far he was from mihawk's level, clearly he was scared but not of death
And he's immoral for using the raid suit? Bro how? , he used it at first because he didn't think it had any side effects
Now he finds out it's slowly turning him into an emotionless monster, literally no reason to use it again, and it's not like he knew about the potential risk for others when he wore it the first time