So,
- 2 conductor into left box that is power.
- 2 conductor from left box to right box, these would be the traveler wires
- 2 conductor from each box to the light.
I think you want to wire
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the neutral from the power romex to the white of the romex going to the light from the left box and to the white of the romex going to the other switch. Connect the white to the neutral terminal of both switches and to the neutral of the light.
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The live from the power romex to the black wire of the romex going to the other switch box. Connect it to the line terminals on both switches.
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Connect the black of the romex in the left box to the load on that swtich.
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Cap off both wires in the romex going from the right box to the light at both ends.
The left switch will control the light. The right one is just a controller now, you use it to control the left swtich.