I'll try to have a positive outlook on this.
Ok so you said it's his thing to help people and that he wanted to help you, but he couldn't. Are you sure that is how it is?
I am in some ways similar to this guy, so maybe I can offer some advice on his perspective of things, first off how did it end? That's important, did he show signs of ending the conversation maybe for good? And how recent was this?
Because for people that want to help others, there's only so much we can do unless like we're giving you the attention that we would give a Significant Other. A saying a friend phrased perfectly for me is this: "I can build you a boat, but you're going to have to sail it."
What I'm hoping happened here is that the guy saw you were in need of someone, supported you throughout a short period, gave you the tools to make sure you could feel better about yourself in the future, and then moved on to others.
As you said, you think it's a complex of his, thus he won't be able to help you all the way, he'll give you the equipment, but you'll have to climb the mountain yourself. The complex of his will see that you're good enough to go on by yourself now, so he moves on to a next person, because there are so many more out there that need help.
For me personally, the only time I would ever sail the boat with someone I helped or climbed the mountain with them is either if I owed them something huge or I intended to marry them. That's just me, but maybe that explains why he just left abruptly, because he didn't have feelings for you and his job was done.
Hope this helps.