People talk about Badfinger as 2 members did themselves in but I think Pete Ham was going to kill himself anyway due to the self-harming and cutting he used to do before they had the doom Warner Bros contract. It makes you wonder if he was in a relationship with Tom Evans, who hanged himself soon afterwards, as Pete Ham did.
Joey Molland did ok for himself by staying in America, owning a bunch of petrol stations and touring around the country and releasing solo albums.
I explained to a friend that the Bay City Rollers got screwed more than Badfinger he wasn't having it, maybe because he is a diehard Badfinger fan, so he holds his biases. I have no idea if it's true, but when Les McKeown did Never Mind the Buzzcocks, the cast and crew went for a drink after the episode was wrapped, they invited Les, but his first response was "I can't afford it".
I can think of others who were in the same boat, for example, Big Star, Moby Grape, XTC, John Fogerty getting sued because he sounds like John Fogerty

, Tommy James had to please the mafia and work for a pittance, they don't get a mention and the countless Black Doo-Wop groups from the 50s.