The ratings for Ryan's Hope had already slid before then, so I'm not sure if it would have made a huge difference long-term. I think the show had failed to sustain themselves past a very small group of characters.
There was a hideous storyline in 1979 where Delia was playing the stock market, and doing well, and Johnny, jealous of her, started playing, only to lose everything. Instead of blaming himself, he shamed Delia until she bought the bar to keep the family from being thrown out. He and his sidekick Kevin laughed at her and treated her like garbage even though she was the only reason he had not put his family on the street.
This entire story, especially when her Barney Rubble broker got involved, is one of the worst I've ever seen on soaps, and significantly damaged a number of characters.
Around this same time, he encouraged Siobhan to spearhead a rent strike which led to a serious beating for Jack and Siobhan and Jack being trapped in an exploding building. As Siobhan got all the blame for this, Johnny said nothing about his role in her actions.
I thought he was a self-righteous, very petty, childish man who always wanted to show everyone how right he was, no matter the price paid.