这样写可能好点
I was deeply shocked by what I saw/had seen in this picture.
既然前面用was,是过去时,那后面就不能接have seen,是现在完成时.可以改成had seen或者saw,保持前后一致.
或者这样：
I am deeply shock by what I see/have seen in this picture.
或者都用现在时,后面可以是一般现在时的see,也可以是have seen,现在完成时.
那个 profoundly 有点用词不当,是“深刻的”的意思.一般形容思想,理论.
i was 和i am shocked 都可以,如果你的下文都是现在时,那就用现在时,如果你只是强调,你当时的震惊,而现在已经没事了.就可以用过去时.