oh wow that was you! I am not a member of dashcamtalk but I do read it, and I read your thread previously. Sounds like you got a defective unit. Mine is very clear/sharp during daylight conditions, not blurry at all...the night is not so bad for me because there is a ton of street lights here in the city, so it is never really dark out.
I bought the original A118 non-capacitor version from spytec in December, but it was defective. Sent it back and decided to wait for the capacitor version to come out. Bought it from gearbest and have not had any issue luckily.
I used this to hardwire it in, very simple;
http://thedashcamstore.com/dashcam-installation-kit-5-volt-usb-plug-low-profile-mini-fuse/
and used these directions to route it and the same fuse slot to make it all work:
http://www.mazdas247.com/forum/showthread.php?123829094-Hardwiring-a-Valentine-1
just an FYI, the wiring harness only comes with 1 fuse...you need to install another fuse into the empty slot to make it power on.