Barre was a deeply flawed president, but that's not what we were arguing.
You're assigning the blame of what became of post-Siad Somalia on Siad himself.
If Meles Zenawi decided to JUST Ethiopia after Mengistu, who on earth would blame Mengistu? Literally within months of each other, both guys overthrew their dictators.
One consolidated control like literally every single other victorious rebel and ruled until his death, the other guy fucked his shit up so bad he died during an intra sacad gun battle in Mogadishu.
Idi Amin got wrecked by Museveni, Mengistu by Meles, Siad by Aideed, Hutu Power by Kagame etc.
Yet only one of these guys decided to go on a rampage instead of ruling like everyone else.