B.G 14.16
karmaṇaḥ sukṛtasyāhuḥ sāttvikaṃ nirmalaṃ phalam। rajasastu phalaṃ duḥkhaṃ ajñānaṃ tamasaḥ phalam ॥16॥
The outcome of virtuous actions is considered pure and untainted, while the outcome of passionate actions leads to sorrow, and the outcome of ignorance leads to darkness.
Gīta Bhāshya 14.16
The result of passion indicated as 'sorrow' in the context means a mixed bag of happiness and unhappiness, which ultimately leads to sorrow. But this is not as bad as ignorance.
'rajasastu phalaṁ duḥkhaṁ' iti alpasukhaṁ duḥkham। tathāhi śārkarākṣyaśākhāyām-
The phrase 'the result of passion is sorrow' conveys that it brings little happiness, which is also sorrowful. This is indeed stated in the Śārkarākṣya branch:
"rajaso hyeva jāyate mātrayā sukhaṃ duḥkham। tasmāt tān sukhino duḥkhina ityācakṣate॥"
"Limited happiness and sorrow are born from passion. Therefore, they call them happy and unhappy."
iti।
- stated thus.
anyathā duḥkhasya atikaṣṭatvāt tamodhikatvaṃ rajaso na syāt ॥16॥
Otherwise, i.e. taking it to be extreme difficulty and only sorrow, would render passion worse than ignorance, which is not.