Nah, makes no sense that someone is able to fight her 1vs1 and even trashtalk her all the way through pre and post their clash, to simply die against that
Its normal for someone to get scared when realizes his enemy is too damn strong, Luffy is one of the best examples, especially when Queen himself realized Big Mom was indeed too strong for him to beat alone, he simply understimated her a lot and saw that he was completely mistaken. But he didn't used his full potential, neither had the possibility to do it, cuz BM got knocked out
Queen's overreactive trait is a core of his character
At an especific moment he is like "

",
then hes suddenly "

"
Then "


", in a matter of a few seconds
He didn't gave a shit when Luffy uses his CoC, Luffy himself knows how strong Queen is, to the point he places Big Mom and Queen at high level threats.