Garudapurana 3.16.57

3.16.57

yataḥ kaliścādhikaḥ syādato duḥ khīti sa smṛtaḥ /
daityānāṃ puṇyapāpābhyāṃ duḥ kha mevottarottaram //

Because Kali has it in excess, he is called Duḥkhin ('the suffering one'). / For the daityas, through merit and demerit, there is only increasingly higher suffering;