Worst UI since Acrobat Pro 11

Very glitchy and crashes when i want to measure (which is what i use for work)
All the different symbol color changes inhibits productivity as everything is now gray scale.

Where can i go for a refund and can i be hooked up with a fresh copy of acrobat pro 11. I don't care if it's no longer supported, just let me have it so i can retain fluidity in productivity.