I just completed a kit myself firmware will drive you crazy if you let it but take time and breath .
it only takes one bad setting to make things not work correctly

my printer is a sunhokey prusa i3 bought from https://www.aliexpress.com/item/2015-Up … 0.0.o69Sts, the first problem I have is the full lcd (with controller) shows blinking question marks on the XYZ axes meaning the endstops aren't hitting and when I send the M119 command I get all endstops as open. I noticed actually that now the X and Y axes are at their home but the Z axis is not at home, the LCD shows "Endstops Z", maybe it is the opposite way for me?

I think what causes the following problems is the motors getting too much/too low current, the Polulu DRV8825 heatsink getting a bit hot but I don't know how to solve it.

The x axis moves fine, however when I try to return it back it doesn't move(only a little bit, it seems like it is hard for the motor to move to the other way) and I actually get something like: "echo: endstops hit: x:9.83"

The Z axis only goes up, but I don't get the message like I get for the X axis, it just doesn't go down.

The Y axis is jumping and moving weird, if I move it +10 a couple of times, sometimes it will go to the right direction and sometimes it will go to the wrong direction, and the belt is jumping insanely.
My connections are like http://www.makersking.com/eBay/Items/DB … 1920px.jpg, a pic is http://fastpic.ru/view/89/2017/0408/be9 … 5.jpg.html. I will add videos if needed. My configuration file is https://pastebin.com/0hHLpMcS, note that somehow my steps_per_unit values is very very low, but if I move it 100 steps, it actually moves about 96mm so I don't know why it is so low yet close to reality.
I think that's all the issues I got and I gave all the information needed, I will add something if it will hit my mind, and please ask for more information if needed