Hmmm. Your loyalty does something credit!
Liverpool are "world champions", European champions, Premier League runners-up and Champions elect. Yet they haven't got any reserve fullbacks? Who's running the scouting and the bank, then? And while I can see that losing ALL of VVD, Firmino, Salah and Mane might be a problem, the odd one shouldn't be a problem. I mean, Newcastle had nine, NINE first team players unavailable in the first match against high-flying Rochdale and still managed to score their equaliser first and hang on effortlessly for a draw (who knows what might have happened if they'd not been so effortless?).
No, Klopp underestimated the task, plain and simple!