"she just literally empties them and the eventual screaming is because I don't have any more milk to give her"
and
"Also thought she was supposed to be growing out of evening cluster feeding now"
The two may be related. The purpose of cluster feeding is to increase your breast milk supply.
She probably does more or less empty your boobs after cluster feeding. You'll still be giving her a little milk (and a lot of comfort sucking) from the breast but not full feeds that leads to 'milk drunk' sleepiness. The continued sucking 'teaches' your body that more milk is needed though.
By giving her a bottle of expressed milk, your breasts are not learning to make more milk at this time of the day. So therefore she cannot grow out of cluster feeding because the cluster feeding is not serving its purpose of increasing your milk supply.
For what its worth my DD (nearly 6 weeks) has a fractious, unsettled few hours from 5pm through to bedtime. She will feed, refuse, suck hands, scream, feed more, get upset because boobs are empty, scream some more. And so on. It's just normal. I know its nothing personal against me, she would be just as unsettled with anyone else.
You are not doing anything wrong. Just let her suck/ breastfeed and try to help her sleep.