Video rendering taking 13 Hrs to render for a normal video less than 2 minute
Rendering speed depends on a lot of factors. Things that slow the render down include

using a lot of CPU intensive effects,
lots of CPU intensive precomps,
effects which require multiple frames to be calculated, such as echo or time displacement,
using many source layers, particularly high resolution sources that take time to read from disk,
some effects are just dog slow because they've never been optimised that well,

and lastly, but probably most importantly:

memory issues: if you run out of RAM then it starts swapping to the hard drive, which even on a fast SSD is an order of magnitude slower than memory, so even simple compositions will take an inordinate amount of time.