i think the hood is too 3D and there should be a bulge only in the middle, whereas on yours, the bulge is at the whole rear of the hood. it should be flat except for a bulge in the middle of the hood (if that made sense) and the hood shouldn't be overhanging the lights
here's a pic for reference
Oh, an i like your trailer for the custom garage
this doesnt happen to my 1x1 round plates, but it happens to my cheese slopes and all of my plates. some of my bricks with technic holes have cracks too. all my minifigs have cracks where the torso fits onto the legs
EDIT: if we're talking about 1x1 round bricks, mine are really loose (no gripping power at all, but i dont see cracks)
I'm only a TFOL, but my family gives me crap like that already. i just build with my sisters who are both kids so my parents think its fine for me to play with them