What is your question? Something like: "How can I install PHPWord manually?"?

To answer this kind of question
I looked into the related repo on GitHub. Nothing about a manual installation. On the installation section of the readMe we have: "PHPWord is installed via Composer.". To use composer seems to be the only possibility nowadays. When using composer, the shown example in the same section should be valid.

You could still do it by your own. But then you must download all dependencies, place the files in a reasonable structure and implement a correct working autoloader.

Find the dependencies
Looking into composer.json of PHPWord the only dependency is phpoffice/math. This lib, in turn, has no dependencies. (the old dependency was phpoffice/common, see the links from the second link of OP)

Place the files in a reasonable structure

• In root of your project add a folder e.g. phpoffice or vendor/phpoffice.
• In this new folder create new folders: e.g. phpword and math.
• Download the whole PHPWord repo and place the content into phpword folder.
• Download the whole Math repo and place the content into math folder.

Implement a correct working autoloader
How to create an autoloader can be found e.g. here:
how does php autoloader works

Make sure you find out, where the error was logged. When you fix your project according my description above and still have errors, then probably we can't help you anymore without the error log.