“Every type of startup” is dead
You, maker, builder, founder, stop listening. Startups are starting all the time and while plenty do fail in reality, you can hustle, you can continue to learn, you can lead, but you must be open to learn and you must have confidence. Yes, help won’t come easy, building an audience is crazy difficult, but you can’t let that be what stands in your way. You must focus in, you need to push yourself, and stop listening to whoever is telling you this.
Every problem in the world has not been solved, and those discouraging, might just be threatened by your ambition. My advice? Stay hungry, listen to those who can offer valuable feedback (not just telling you that every idea out there is taken), and just keep working.