“Growing up with no clan wasn’t...great, you encouraged him to hate you and to grow strong enough to kill him to act on that hate before you left so he could be the one to punish you for what you did.
And growing up believing you have to hate your own brother so much that the hate could let you catch up to him to defeat him... He was very angry all the time and never made friends, it was unhealthy and obssesive and in the end he betrayed the village once he found out the destruction of his clan was ordered by a village elder.
He went to Orochimaru after he promised the power to deafeat you, knowing Orochimaru wanted to take over his body as long as you died he was fine with it.
He was sorta rival friends with Naruto and Naruto tried real hard to get him to come back to the village, he did eventually after they defeated a threat to the whole ninja world together and broke the cycle of the Asura and Indra reincarnations fighting each other but it took years.
It all ended okay, he got married and had adorable kids to rebuild the uchiha and helped Naruto run the rebuilt Konoha, but too many people died and suffered to get there, so I want to change things early.” Sasuke had such a shit life in the manga, no wonder he was an angsty jerk all the time in that timeline.