I have looked at a few of your piece. I will tell you right now, collage is not a medium I know well and I have a hard time judging visual art in general art. So I will tell you what I observed, and I will compare it to what I know. I'm sorry if it's not very useful, I did my best to do what you ask.
Your collage often have identifiable figures and fading images. Or sometimes the pictures is covered in a sort of filter, like this. The overall impression is of a dream world: a reality that is removed, less tangible, but still whole (the identifiable figures contribute to that wholeness, the fading images and filters to the sense of intangibility.) Some pictures are more busy than others, more chaotic than others, but they always feel broadly coherent.
I say this because the only collage I'm vaguely familiar with are those made by the Dadaist. Dadaist collage are chaotic, fragmented, often with faces and object being distorted and a often a sense that an explosion is happening in the piece. They feel violent.
Yours don't feel like that, they feel more calm. Removed even. The exception is this.
Whether this is a criticism or not depends on your artistic intent. Do you like that your art is more gentle? I'll say for me, the fading and dreamlike part of them make me feel uneasy. Like, a world is slowly dying out. What I thought was real is actually rotten. I don't know if that unease is deliberate or not, that's up to you to judge.