Don't be devastated. Just don't. You have new floors, and it sounds like the color/tone is right, just too many knots. I personally think color/tone (and of course, choosing the right material and quality that will serve your needs) is way more important to the overall look and feel of your space, than whether your floor has more knots than you wished. This is where you need to work with managing your expectations and seeing the big picture.

My advice is to focus on layering in your rugs (plenty of them) and furniture, and coordinating your paint and artwork to create the entire effect. Forget about the knots. Everyone else who sees them will not know you didn't intend them.

Truly, decorating regrets are what brought me to these forums in the first place, many years ago: I would obsess about choosing one item of decor in my house, and usually dislike it for a reason that I had never considered when shopping: lessons learned. Money spent on a sofa with an inadvisable color; terrible paint choices; and much more $$ spent that didn't work out as planned. But what I now realize from the excellent designers who give advice in these forums is that the decor and design and feel of a space come from the totality of everything in it. Don't focus on just the one thing you don't like: learn from it, design around it as a professional would, and create a whole effect and feel from everything else you layer in. Does this make sense?

Just work with it. You can do it.