Linux

This man page is thirty pages long and has in depth descriptions of all fifty switches in alphabetical order, but all i want is an example on how to do a very simple, common thing with it. And of course, all commands have their own syntax (of course windows isn’t any better, outside of Powershell).

Yes man is intended to be a manual so it's understandably bad at being a cheatsheet. Check out tldr or tealdeer. They are similar but I found tealdeer to be much faster for me. Also try a shell with better completion than bash, like zsh or fish. Having better completion will sometimes sidestep the need for a cheatsheet altogether.

Don’t curl to bash, it’s dangerous.

You can curl the file normally, inspect, and then run it with bash. All the safety issues of running stuff you found online still apply (is the source trusted?), but you don't get the issues that arise specifically from piping curl to bash. But most applications don't need you to curl | bash in the first time because of package managers.