I purchased a lot of hard copy books. Was that a waste, as I seem to need to purchase the soft copy as well as the hard copy (which seems to heavily favor people that have lots of money over those that just want to play)? I seem to be missing some critical information to add my purchased hard copies to my online library on this website. I would really appreciate someone setting me strait here as I am not seeing a lot of hope to make this work. I own a lot of hard copy books and don't have the money now to get the soft copy books. Should I have purchased the soft copy books instead? I am really frustrated with this situation and would really like some kind of help or guidance. Thank you everyone.

There is no easy way to get your hard copy books onto this website, just like how buying a fiction book in a store doesn't entitle you to a free copy on kindle or whatever online book service. 

It seems that D&DBeyond tends to work better for those who don't own any physical books, like me, because people like me don't see buying the books online as a waste because we never had physical copies. 

If you want to use your hard copy content on this website, the only ways to do so are to buy the digital copies here, or use the homebrew tools and recreate everything you want to use.

It's hardcopy vs digital, not soft copy

While some, not all, TTRPG printers do include a free PDF of a hardcopy book when you buy the hardcopy (either through their store or a service like Bricks and Mortars if you buy retail), D&D Beyond's digital books are not PDFs, but a digital edition integrated with D&D Beyond's toolset.

D&D Beyond isn't essential to playing D&D, just like miniatures and battlemats, and all the other game accessories put out by WotC and other businesses are not essential to playing D&D.  

You also don't need to buy the D&D Beyond version of your D&D hardcopy if you're willing to put in a bit of sweat equity.  D&D Beyond has homebrew tools, through which you can do to translate your hardcopy material into your D&D Beyond account.  I'm no coder, but I've successfully managed to introduce races, subclasses, spells, magic items, I haven't done a monster yet since I really only use DDB for the character builder tools, from official WotC and third party publications.  I've actually enjoyed the experience as it's taught me a bit about game design and has improved my own personal homebrew, I feel.    Honestly, I haven't bought the last maybe year of WotC releases, since I buy the hardcopy, though feel comfortable homebrewing what I may need into my tools collection.  You also don't have to buy entire books, you can buy content piecemeal (particular subclasses and the like).  

"I gotta buy twice" is a common complain about people becoming aware of D&D Beyond as a different line of products from the hardcopy books.  The truth is you don't.

Now for the next iteration of D&D, currently being playtested as OneD&D, it looks like WotC would at least want to make available the option to buy hardcopy integrated with digital, and are experimenting with the upcoming Dragonlance book.  That said, it's an experiment and I don't think even folks at WotC/DDB really know what that integration may look like, if it goes forward.  I can say from the current experience, it doesn't look like they'll "just give" access to the DDB version with a hardcopy purchase, they'll be available as bundles which will cost more than the hardcopy.  

MidnightPlat speaks wisdom. For additional information, see my signature for answers to questions and content you can use on DDB for free.