Every cycle is different. The more cycles, compounds and miligrams you pump in your body the bigger the damage is to the body. We hope for the best recovery but the truth is that every cycle will leave behind some kind of damage. That is why most gearheds eventually end up on trt. Nandrolones are infamous for causing erectile dysfunction. I hope you took enough time to recover after that cycle and to be honest, the dosages you use are pretty high.
Weak erections could def mean problems with vascular system but since you mentioned you're on trt I assumed you were thoroughly checked out by your doc before he prescribed the therapy or is it self prescribed? Get the bloods done, and if everything looks ok then go see a doc. You can start with your endo. Any cardio related issues in the past or family history? How is your diet? Hormones will fuck up you lipids which will lead to artherosclerosis. Did you really blow up like crazy with water?