We have no fit left backs, and we have no cover for Clarke
We currently have 7 players out injured from our squad of 29, meaning we have enough for a full bench and 2 reserve players.
Of the 7 injured players, 2 (Huggins & cirkin) won't play again this season 2 (Evans & Embleton) haven't kicked all ball yet this season. Alese and Dack are notoriously injury prone so it's really only Roberts that we can rely on to be added to the squad
Of the 22 players we have remaining, 4 (Hemir, Burstow, Mayenda, Bennette) aren't yet good enough to start games and the jury is out on another 5 (Aouchiche, Pembele, Triantis, Matete & Rigg) and certainly shouldn't be relied on to contribute to games on a consistent basis.
Once you look past out first choice XI there is very little in reserve
We have a 30 man squad in the Championship, injuries are part and parcel, as well as the very reasoning behind having a squad, whether they're good enough or not does not change that fact they've got a contract and expectations of minutes. You're thinking emotionally not practically, how many of Rotherham's squad are good enough? Tough ****, you've got who you've got.