Your content isn't getting ranked just because of choosing the wrong keyword. It's 2024 and you're using key-word strategy from 2014, that's not going to work in today's competitive business world.
Choosing the right KW is the base of all SEO efforts. You need a more specific(customer-centric) KW that attracts searchers and is easy to rank. Let's talk more in my chatbox.
By the way, if you want me to do in-depth keyword research for you, I will also be happy to work with you. Please take a look at what you will get.