Zero Gains After Roughly 1.5 Years....

Goal: Girth only Have been doing PE for roughly 1.5 years and have not gained anything at all. Routine for the last few months has increased to: 6 days per week 5 mins manuals, 30-40 mins pumping (sometimes 2 X 20 mins workouts AM and PM), occasionally 2 × 6 mins clamping (twice per week) Pumping working has evolved from interval pumping to longer sets now of 5-10 mins. I sometimes get girth expansion from 4.75inch to 5.125 inch, on average to 5inch. This is only ever temporary and lasts at most a few hours. I get intense reddening, even after taking everyone's advice so now have permanent discolouration. I am to take a break from pumping and aim to reduce discolouration. Think I may then take a manuals and clamping only approach to see if that makes a different. If any hard gainers (girth) have any advice or insights, I'd love to hear then, as losing hope.