I'd practice smoothing out my pedal strokes and leave the crankset alone.
How do you like the overall gearing? Do you ever use the lowest gear of 34t-34t? Or highest of 50t-11t? If not I'd swap in a different cassette, like a 12-25t.
I agree with EVERYONE 😂 on the saddle and especially the tires! A nice set of tires will be the biggest improvement vs cost.