I know it's sometimes popular to reflexively say that Delphi's help sucks. And it's not like Borland and Embarcadero haven't given us some cause, but the documentation really has gotten much better over the years. Of course, there are still issues; New features that aren't well documented (placeholder pages), help topics that are automatically migrated to a new version, but links aren't updated or are broken, etc.
If you've noticed a mistake or have a pet peeve with the help and you're so inclined, there's something you can do about it.