does that look bad? theres not really anywhere to route the cables so i had them clattered on the side and the only way to access the sata ports is through the back panel because i cant get my hands passed those wires.
Does is look bad? Yes, but as your temps shows, it still works pretty well.
What I did when I put together my office PC, also in an Antec 300, was to remove both side panels for easy access, and then route all cables to the back (side of the motherboard), and attaching them on the side of the drive cage, as per its design.
Doing the cable routing this way will give you a nice clean look and a good front to back airflow path.