OK poor use of literally.
Hes saying he couldnt play it on a mouse and keyboard and the whole "precise" issue, at least to me, suggests a controller would be a better fit.
Theres not enough info in his post for me to judge its content as indicative that he "needs" a controller. He could be terrible with a controller for all we know by the info.
My suggestion to him would be this...
If you are decent with a controller, give that a try instead. If you've tried controllers in the past and not got on with them, then give Elden Ring a go on mouse and keyboard, its entirely doable, and remember as we've already mentioned the combat mechanics in Elden Ring are somewhat more forgiving than Dark Souls, especially if you are new to the souls genre and only played 1 hour on Dark Souls.