I used my 2x135mm 1x120 Paterson tank for a while and rolls kept jamming on me. First, I hate the tank because its always messy and sprays like a deodorant when opening the lid after inversion even with practice and holding a tissue in front of it it's always a gamble.
The Paterson reels are terrible the ball bearings destroy the film border 90%, most the time they can never grip the film fully when turning the reel. Sometimes my reels were dry and loaded terrible, sometimes my reels were wet and it loaded perfectly fine, and the other way around. I read every post online I could find what I do wrong, I started cutting the film border edges in different angles and sizes dried reels over night between development it never stopped.
Sorry, but that's completely
not my experience with the Pattersons. I do occasionally let off some pressure if it looks like the top is starting to bulge-- that may be why mine never sprays, merely dribbles a little when I let the excess pressure off.
Your ball bearings are jammed, which you should check before using the reel. There's no other explanation for them damaging your film. The stock Patterson reels are mildly irritating with 120 film-- the AP reels are no problem whatsoever.
I would suggest sacrificing a reel in the light to see what's going wrong, but it's obvious you've made up your mind and moved onto other things. In the USA, anything with the word "Jobo" on it is double the cost of any equivalent accessory.