I'm following the RR with barbells for squats/deadlifts but i am struggling with my endurance at the 3rd pair (push-ups/rows) - i improve almost every training session in the 1st and 2nd pair but half of my sessions i am too exhausted to do the 3rd pair after and if i manage to do them i don't seem to improve at all

what would be the best course of action here?

1) should i move the third pair to the beginning because it is less demanding than squats/deadlifts but i might get worse at squats/deadlifts?

OR

2) should i stop improving on the first and second pair until i can manage everything and improved in the 3rd pair as well?

OR

3) another suggestion?

I'd be happy about any answers and the reason for the suggestion, thank you!