Alas, he himself was a man too easily encouraged, too completely seduced by hope, only to be devastated by disappointment. He'd been born to privilege, conditioned to expect things would go well, and pathetically unable to cope once they started to go wrong.
The character described is someone who has been raised in a life of privilege, leading him to have a hopeful outlook on life. This environment has instilled in him an expectation that things will always turn out positively. However, this strong belief in the potential for good becomes a weakness when faced with the inevitable challenges and disappointments of life.
As a result, he finds himself easily swayed by optimism, unable to handle the reality of failure or setbacks. His inability to manage disappointment reflects a deeper struggle, suggesting that his upbringing has left him unprepared for the complexities and hardships that can arise, which ultimately leads to his emotional vulnerability.