You need to improve your case designs by a long shot.
1. Improve the interior design on the cases (this is also available for all manufacturers) by properly orienting the hard drive cages and simplifying the layout (stacker or classic layout), make sufficient provisions for watercooling radiators to be installed without any hassles, provide a space behinf the motherboard tray for hiding wires(a snake pit) and leave some room for modding
2. Clean out all the crap from the exterior of the cases (no unnecessary plastics)
The PSU department is ok because the OEMs used for your products are good.
Improve the watercooling product range by making decent blocks and radiators.