Advice how to get out of plateau...

57M 5'9" 147lbs. I'm on "my own plan" because I've just had to do what I've had to do to stay uninjured. I've had a litany of injuries over the last 3-4 years running Grayskull and various PPSA plans. I'm not trying to get jacked. I just want to be strong and healthy in my latter years and keep a nice aesthetic. I have good definition in chest, arms and abs from what you see below, not sure what to do from where I am now. No supplements othere than creatine 10 gm/d in split doses. Protein intake is 100-140 grams/d depending on schedule.

Here is my upper body routine:
Morning before leaving for work - weekdays only: Unweighted Pull ups 3 sets 10, Chin ups 3 sets 10, Pushups 6 sets 15. This is my no CNS fatigue get the blood flowing

3 upper lift days evenings:
Curl Bar curls 10@65, 8@70, 6@75, 6@80 (failure)
Weighted pullups 5@20# plate x 4
Shrugs 10@165 x 4
Yates Row 10@85 x 4
Pushups 20 x 4
Skull Krushers 6@70, 5@75, 4@80, 4@80 (failure)
Abs 12 sets 40 second leg raise holds

I have been stuck here the last two weeks...take a week off? reset at lower weights?

I can't do overhead press or bench because my left AC joint gets so inflammed (had a mumford procedure to clean out the joint and shorten the clavicle when I had labrum/RC surgery on right shoulder in 2015, I think my left AC joint needs cleaning out too).