How do I know my product can really be a breakthrough?

"no one seems to understand or care" is usually less about the product being wrong and more about where you're putting it in front of people. the world is genuinely bad at recognizing something new on the first look, especially if the pitch assumes context the reader doesn't have yet. before deciding whether to give up, I'd try to get just 3-5 people who actually match your target user to use it for real and tell you exactly where they got confused or bounced off, not just "cool idea." that's a very different signal than silence on a launch post. what is it, and what have people said so far when they actually tried it (not just saw it)?

Dont feel down if youre not getting traction immediately. It will take time. Remember, no one will care about your product as much as you do. So you need to market it to people so the features and UX that make you giddy are clearly understandable to the usual NPC