"There was no attitude of poverty in his poetry" 絶無窮態 more Joseon dynasty classical Chinese.

In the poetry he had written, in the end, there was no attitude of poverty. How was it he never became well-known?

其所爲詩絶無窮態。竟不振。何哉。

Does this make sense? Can it be more loosely translated as this person's poetry was really good, or something like that?
穷 shouldn't be taken literally as poverty, instead, it is figurative exhaustion of one's talent; reaching the limit of one's capability. Also I am not sure 振 necessarily means becoming well-known, it could be simply hanging on steadily.

Without further context I would interpret the sentence as


  The poetry he wrote showed no sign of exhaustion, why didn't he keep going?