It could be a couple of issues:
the heated bed tries to use more power than the ramps board is capable of because the traces on the board aren't big enough to get rid of the heat.
the thermistor is broken / not properly connected or configured, and it keeps on heating the bed forever.
a short somewhere in the wiring.
Check the wiring. If there ...
This is not "loosing details". What is is is this:
You can not print on air. So, certain things (like the backpack) require SUPPORTS that are removed after printing. Another example is the gun.
Your support setting force the slicer to set up quite a lot of supports and that is what you see - start removing them.
There ALSO is a problem with ...
I had a similar problem with PLA after upgrading to all metal hotend. My printer was in a cabinet and after some time in print had the same problem (heat creep). In the end, it was resolved by turning bed off after first 3 layers and turning on a fan to keep the cabinet cool.
I was having these issues too on a CR-10S and I worked on it for months and the only thing that would fix it was the spread, overlap, and width of the extrusion, this may also be caused by the fact that I haven't really tried to use glue stick or anything to get my prints to stick better.