quite a few people told me that they hate oil pastels, because their pictures look like child drawing

1- this happens with low quality pastels that do not smudge, blend and cover well and it is very frustrating. here are some links about oil pastel brands:
http://www.explore-oil-pastels-with-robert-sloan.com/oil-pastels-reviews.html
http://www.oilpasteltechniques.com/oil-pastels-brands-comparison/
2- I don't know whether it is common, but all my drawings look childlike until they are almost finished. So i took these horrible phone photos to show you the ugly truth behind my pictures: