If you dont think arrogance includes a component of "I deserve to be approved of for what Ive done" I guess its a semantical disagreement? In any case, I agree that feeling a sense of accomplishment ("wow, something really nice happened through me") is not inherently suffering. Its suffering when it becomes a narrative carried on in time, aka "no one is ever gonna read my masterpiece novel, people are incapable of appreciating true art" etc.
As far as questioning beliefs, suffering is the result of believing things in an absolute way rather than recognizing that your life experience is completely subjective. Specifically, it results from believing that people are independent agents rather than complex machines, and believing that their happiness is dependent on positive outcomes. If these beliefs are never questioned, especially since society continually reinforces them, there is no way out of feeling uncomfortable with yourself, obsessing over alternate pasts and hypothetical futures