Tony was a miserable dude.
Anybody that experienced any form of happiness, he tried his best to sabotage it.
Biggest example was his relationship with Chris. Always undermining Chris and ridiculing his sobriety.
The most telling scene was in Season 5 when Tony, Janice, Bobby and Bobby's kids were all at the dinner table. Janice was talking earlier in the episode about how good she felt and relaxed. At the dinner table,Tony was just staring at her, bewildered and then full of contempt. He resented her peace of mind. Then he brought up her son, which he knew would set Janice off, and it did. Totally uncalled for. Just an a**hole.
Janice did all types of rotten shyt. She's far from a victim.