Thats totally correct! I have been on every page looking for some true criticism and found this, very well said.
Either they are hand drawings or photos, with threshold increased, no true illustrations. They seriously lack professionalism.
#1-Should have been a monster, and a lot of space is left blank.
#2-This ones good, but dont think its very suitable for a T-shirt design
#3-Threshold increased, looks too diagrammatic instead of artistic.
#4-Nice line art, but its good in complement to logo, not as good for a poster.
#6-looks dull and boring
#9-I voted for this, could have been improved using strong lines around mouth of the fish.
#13-Its a monster indeed, but its should look more like a fish than a monster, we are keeping a fish that happens to be monsters actually.
#15-Good drawing work but not fit for a poster at all, so many fishes are making it very busy. Poster, t-shirt and logo art should be like elegant, bold and striking and stylish, certain things are to be emphasized and others are not. You dont need so much of detailing here.
#16- I really love the idea, but the illustrations are not neat and clear.
#21-Same reason as 15, you dont need to show everything.
#22-Looks like a Southeast Asian restaurant logo, where all that are served in their menu.
Sorry for harsh criticism, but couldnt stop myself. Not everyone's got a designer's eye.