The Iron Claw painted Kerry Von Erich as a very sympathetic figure. Here is Kerry Von Erich from a different perspective...
https://www.youtube.com/shorts/QZrcnvvWkFA

https://www.youtube.com/shorts/FNVow68kf8A
when the commentator says "was there a lot of jealousy about the rats". The gangs of women who have sex with pro wrestlers are known as "ring rats" or "rats".

The Iron Claw is a good movie... however... it is a very carefully curated, edited version of the real life of the Von Erich family.