I guess stents are not doing the job or are theses different blockages? Logically I can only think that the cumulative recovery of all your surgeries will be long and difficult even though your eight out from the last, it takes a long time for the body and mind to heal . Don’t know your age but older will add time to any recovery Short story ..
I fractured C1 and Moved C2 falling down a flight of stairs ,had spinal fusion 0 thru C 4 also broke both wrist. That was July last summer surgery was Oct ,10 weeks out . I’m 73 and still don’t feel 100 % The surgery went great …no pain lack of motion in my neck but overall a good outcome considering most with similar injuries either don’t live or are crippled. I wish you well