Some people are like weed, which grows fast the moment it's planted. But others are like bamboo tree, which shows no growth for 4 years but then grows 90 feet in year 5.
Not everybody can reach their 'prime' early in their life. Some are late bloomers, but when they bloom, they could be better and stronger than the early bloomers. And they are the ones who will remain blooming when others are already fallen down to the ground.
Even bacteria and viruses have their own 'incubation period', which differs from one to another.
Don't rush into judging someone. Being wrong once doesn't mean always wrong. Even a broken clock is right twice a day.
To err is human, but to forgive is divine.
Don't act all superior and condescending. Remember the reason why the noblest creature i.e. Iblis, was thrown out of the paradise and cursed to be the lowest form of life among other creations? It was because of the statement, "I'm better than him."