Oof, sorry you had such a bad experience.

> but there is no obvious way to exit. I tried Q,q

It's not very responsive during initial indexing, which is something I need to improve. Pressing `q` should work to exit in general, though. Pressing CTRL-C three times in quick succession will force quit it.

It would help to know which version you tried. Things have gotten better over the years.

> I tried `man lnav` in separate terminal - but no man page is provided.

A man page exists, but only contains basic information. The builtin help text is much more extensive and can be viewed by running:

    lnav -H

There is also the documentation website: https://docs.lnav.org/

> `ps` shows 3 processes which would not die with SIGTERM, have to `kill -9`.

Older versions of lnav would use readline for the prompt and had to run it in a separate process because of "reasons". More recent versions have a custom prompt and don't require the extra processes.

I don't know how you got it but q and Q closes it, and there is a man page on my system at least.