Neovim has builtin support for colorizing man pages, making them easier to read. It also lets you follow links to other man pages, by pressing K while hovering any term that has a man page.
To set up Neovim as the default reader for when you invoke
man apropos etc., place the following code in your ~/.bashrc or such:
export MANPAGER="nvim -c 'set ft=man' -"
There are some more pointers in the short and readable section of the Neovim manual on viewing man pages.