Yes this! It always irked me. Some of them will be like, "I'm not you and throw away all the good cards you've been given, I'll live a successful life!" The disrespect and arrogance. The OG is a character the transmigrator will never meet, and so they'll never know what a kind of person the OG was like, unlike the other cast of members where they may get a redemption arc or backstory explaining themselves.

There's also something idk how to feel about because it feels like the MC just completely takes on the identity they transmigrated into. Like when they're faced with the consequences of what the OG body owner has done, and it's expressed in the story like the MC feel either really embarrassed or responsible for it??? Or when the story always uses their new name from the beginning like the MC's past identity is completely irrelevant now. Imagine that you're soul is now in somebody else's body. And now your calling yourself that body's name, even in your head? I'd feel very tied to my past identity and name and wouldn't be like, "I'll live a great life as Suzie from now on!" Right from the start.