In one of many possible definitions, manipulation requires deceit; a hidden agenda or goal.

In an "original" definition, manipulation literally means "to move". In that sense, we all manipulate. We move.

The two combined together: You're allowed to "move". You are broadly "allowed" to "manipulate" in that sense. If you add lies, deceit, etc, you're in territory others might not find acceptable, and will in turn reject you or remove you from their lives.

If you feel bad about your "success" but can't see why on a rational level, you may want to remember how your parents or other people growing up treated you. Can you find some childhood memories related to this? Potentially "adverse" experiences related to "manipulation" around you?