Even going so far as to literally have a "Curse of Hatred" and saying that an entire bloodline (Uchiha) was literally PREDESTINED to "love too much" and thus end up going mad with power or some crap like that. The only reason such a thing was done was solely to allow Sasuke and the Uchiha to avoid having to take responsibility for any of their actions so ALL the blame falls on Konoha and/or "the system". Not to start such a debate, but it's like how some people try to make up excuses for their own racism, xenophobia, etc. by saying they were born that way and so "can't help it" and so you're not allowed to criticize them or else you're automatically the "real" bigot.
Of course, the "Curse of Hatred", as far as I can tell, has been completely forgotten in Boruto and will most likely never be brought up as an issue for Salad. Ironically, by trying to give Sasuke a free pass, Kishi essentially gave a good reason for why the Uchiha Clan should be massacred. I mean, if you KNEW that, at some point, practically every member of a Clan was going to turn into a psychopathic, murderous, power-hungry, etc. individual (ignoring the convenient picking and choosing of plot-important and/or favorites ones) as they got older with NO known other way of being able to stop it from happening, then wouldn't you think it would better to put them out of their misery rather than just keep letting it happen over and over again for as long as the Clan and/or the village existed, causing the individual, the clan, and others to continuously suffer?
You see, **** like the Curse of Hatred really pisses me off in the long run because as you said, it just allows someone with it to basically use it as an excuse. It's why I know for my Naruto fanfic I'm dropping that crap, and saying that other forces led to the death of the Uchiha Clan thanks to Danzo's concerns for them and his vanity of their Sharingan to use it for his purposes thanks to the alliance he formed with Orochimaru.
Besides, it also doesn't make for good character development in the long run, since as we saw with Sasuke, even after he "beat" Itachi, he just used whatg he learned about his brother as an excuse to keep running away from reality. He may have chosen the path for himself, but Obito nudged him in that direction, feeling he knew Sasuke would choose to focus on destroying what hurt him so much. And he kept doing it; the Leaf, the ninja system, all because he couldn't let go of the fact that his brother was always better than him, that for wanting to surpass him, Sasuke would never be able to do so.
It makes me think of a line in Red vs. Blue; "Your past doesn't define who you are. It just gives you the starting point for who you're GOING to be." And really for Sasuke, that's what happened to him; he let his past define him because of his love and jealousy for Itachi, and the fact he couldn't deal with the fact that his brother was always better than him, as a ninja AND as a person, even with what he did.
So you see, the series ended up being a "kitten fest" in its own self inflicted hypocrisy, and all those morals and messages end up looking like "just slapped on for the f*&^ing h#^! of it" to sound cool instead of using those plot points to portray a meaningful story with a positive resolution of those themes. Now the series is flopping on the kittening mess it got itself into and gasping for breath like a "fish on land" because they wanted a sequel to continue milking this sick joke that used to be one of the biggest manga and anime beyond bone dry
