this is the current “normal” behavoir. Here’s a bug about that for voting: Steam - Verify Integrity of Game Files Deletes All Content
To your issue:
please recheck that the error message with Renoir… is the latest one - these one which happen while download.
The FAQ mentioned different things you can do and also the forum is full of hints. May be check that hints and tell us what you tried.
If you would give us some hints about your computer specs ( RAM, GPU, free Disc space , kind of network connection, Applications which run in parallel (e.g. process lasso, or other tools ) ) , as what was asked within the issue template which you ignored, we can possible also tell you directly some “pittfalls”.
PS.: in case you own nvidia, not limit the fps with RivaTuner. Just do it with nvidia control center an set both limis “max fps” and “max background fps”. The second one can be much lower, the window is just in background.