Biden is not suffering from dementia. He’s been a class A jerk his entire career. His gaffes, insults, stuttering oddities, made up bull$hit stories, plagiarism, and incompetence, have been a long standing pattern for the guy. The media just stopped reporting on the embarrassing foibles. There were feature network news stories on how bad he was back in the 90’s. Nothing changed. Same guy. Same smacked a$$ of a jerk.
All of his past you raised is true, no doubt. He’s always been THE major arsehole in DC. A crude, mean, evil, vindictive man.
But there’s also no doubt he is suffering severe dementia and it is getting worse by the day.