Is there a way to install Valgrind on Catalina and have it run properly? If so, I would very much appreciate a step-by-step process.
I tried installing Valgrind with htt
Currently, no. The repo you link has an issue raised about Catalina compatibility. As you also show, the brew package has its own problems as well. Official valgrind only supports 10.12.
You'll just have to wait, or containerize it. Although if you containerize valgrind, you would likely need a compatible build container as well.