Something Looks Off, But What?

currently making a short film about racing with like a $0 budget, i usually do fan edits, so editing things like this more on the visual effects side part of things are new to me. ive put pairs of solids, shapes, masks, rotoscopes, reflections, blurs, etc to try and make it look like hes in a helmet, but something still looks off. if u guys can figure out what looks so fake about it, much appreciated :))

https://preview.redd.it/xs140bqs2bpe1.png?width=2559&format=png&auto=webp&s=378cefcffc3427e9b5ad08fbabe9c83f43c773fb