Chaos corruption always starts with legitimate grievances but pushes them more and more towards the extreme until you end up destroying everything you initially cared about. All the fallen Primarchs had good reasons for falling... mostly. Angron was just rabid dog and Lorgar was a toady.
I mean, Horus did nothing wrong? Always thought chaos was cool, just not as cool as Eldar.
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Chaos corruption always starts with legitimate grievances but pushes them more and more towards the extreme until you end up destroying everything you initially cared about. All the fallen Primarchs had good reasons for falling... mostly. Angron was just rabid dog and Lorgar was a toady.