narrow view; limited insight
Literary or formal term for one's own limited perspective or shallow understanding. Often used self-deprecatingly in writing.
my humble opinion
Humble expression used to preface one's own opinion, similar to 'in my humble view'. Common in formal or written contexts.
This is merely my humble opinion, but I believe the essence of the problem lies elsewhere.
If I may offer my humble opinion, I believe this plan is premature.