I'm also in similar phase as you.

I already have 1.5 years of experience in full-stack web development but I feel like I'm not proficient enough in algorithms and data structures.

What I feel like is I need to learn these stuffs as time goes unless I feel like dang it! I can't solve this problem without knowing that one algorithm.

We'll be able to write efficient code with the help of popular data structure and algorithms but turns out in my code-base, or in my languages, those algorithms are already implemented in standard library and I can just import it.

It's essential to know algorithms to land jobs in well known company but not much important to me in my work as of now.