Unlike Any Usual First Roll That Comes Great...

I really have no idea what was happened with my first try a 120mm film roll ever. The emulsion is already damaged when it see with naked eye, the negative is dirty with scrambled black stain, and the exposed images are covered by the pattern on the backing paper. Was all those glitch due to my self develop? I used a paper developer for this time. *fingers crossed.
___________________________________________ Superbroom: 1+7 (60"&15")/14' | Acetic Acid Solution: Stock (60")/1' | Acifix: Stock (60"&15")/14'.