"I have no talent"
Can we please stop this bullshit. Someone with no talent can't simply revive a style using just flashbacks, someone with no talent would never reach the conclusion about the 13th form by just looking at someone else execute the same moves you do in a more efficient way. Tanjirou you're extremely talented, you may not be as talented as the original user, but talented nonetheless. Tanjirou reached the truth about the dance of the Firegod by himself, with no master to help him, with only the vague lessons he took as child, and never ever touched that training afterwards. Moreover he has natural disposition towards fighting, as shown quite early when Giyuu challenged him. Natural disposition + A mind that can easily reach the truth= Talent.
Talent doesn't mean that a person won't work hard to reach his goals, Neji and Tanjiro has proven this fact. You can't tell people to work hard and then demean the hard work of those who were born with talent by having them lose to someone with lesser or no talent and the inverse of that is also true. How insulting and frustrating it should be for the other demon slayers who started earlier and never reached Tanjiro's level, when Tanjiro says he has no talent.