Installtion of a local llm trainer ( every thing is buggy or fails install)

so i have been trying for the past couple of days to install a acutly working tool to help me retrain a open source moddel (as of now i want to train gpt oss 20b) on some jsonl files. the issue is something like unsloth is either impossible to install or gives me weird buggy undocumented behavior, axolot is impossible to install, and there are a few others i’ve tried and they all give errors on install on both my gentoo desktop and a deciated ubuntu 26.04 lxc i made on the gentoo machine just for running the AI training. i would really like it if someone could recommend me a rocm compatible local ai training tool that installs easily and has either good documentation or just works. i specifically want to do training on a gfx1100/7900 xtx