Sharepoint can also export to Excel, from which it might help to open it in Monarch and then export to fixed width text to get something useful to work with, but with fields over 254 characters you're going to run into problems that way.0
HTML can be a pain - as the programs generating can make really fiddly tables - so sometimes I've found using Monarch Utility to prep HTML files helpful. This way lets you convert all line feeds followed by </ tags to just </, and so you end up with nice neat lines in a report like:
the text you want to trap... ... ...
which you can parse easily as a text report, assuming you don't hit the 4000 character limit for the width of a single line.
In your case, this approach might be needed, but I'd need to see a proper sample first to see how the other table elements fit in.
If it's well-behaved, using the "Detailed Description/Comments" as the first line of a two row sample, grabbing a multi line field ending on a suitable stopper template, and cleaning up with Extract() should do the trick.