'you dare become a enemy of my family'
Don't they ever think of why someone might strike their young master? I guess it wouldn't be a cliché where it keeps escalating in power
(little punk gets slapped, senior steps in and gets killed, elder gets slapped silly, ancestor steps in just before finishing elder, mc gets help just before getting trapped/killed and in a matter of weeks finds some ancient heritage and assimilates it into mc's powers to become on par with ancestor, repeat with an older/bigger clan/family)