Extrusion decreases speed after Klipper

Basic Information:

Printer Model: Ender 3 V2 Neo
MCU / Printerboard: 4.2.2 gd32f303
Host / SBC: Debian 13 Laptop

Hello there, so i recently managed to install klipper on my ender 3 after I have been struggling for some time ( I’m new to this ). I managed to calibrate everything, using printer.cfg files for the ender 3 v2 neo from the internet and then making some changes so it is tuned for my printer, but there is one last thing that is not working. For context, the ender 3 v2 neo comes with a bowden extruder, thanks to a modification I found online I was able to take the bowden setup and transform it into a direct drive setup, which on marlin, worked flawlessly. But on Klipper I am having some issues, when I try to extrude 15mm or more, the extrusion first works fine but then it slows down massively, and thus it doesnt extrude the demanded amount, the stepper motor continues to move at the same speed but the filament slips maybe because of the back pressure. I cleaned the old nozzle/ installed a brand new one, I used another filament, I set the temperature lower, I cleaned the inside of my extruder which wasn’t clogged, I changed my bowden tube ( the old one was still fine ), I changed the gear tension ( tighter and lighter, the way it was before it worked perfectly on marlin ), I tried setting more esteps, but nothing works. So I thought I might ask on this forum hoping someone could teach me some wise new things.

Thanks in advance