The left-back joined City aged 16 but after some loan spells and a brief move to PSV Eindhoven decided to move on.
The Spaniard is now playing regularly and thriving under Leipzig boss Julian Nagelsmann, who he says had the "courage" to use him from the start.
"I had a rest when I was with Pep for six months, that was enough," he said.
"I don't want it again. That's why I want to be on the pitch. I don't like being out. I am thankful that I get to play most of the time. I had enough holidays."
Asked about Guardiola and Nagelsmann, the 24 year old said: "They both like to play with the ball, get the ball quick, there is one thing that is a big difference - one gave me the confidence and played me and the other didn't.
"So I am thankful to Julian for the trust and sometimes you need, I don't want to use a bad word, you need courage to put a player and he did from the first game."
"It killed me," explained Angelino. "The confidence was everything, when you don't have the trust of a coach it is everything.
"I was judged for pre-season, two games, and then I didn't get my chance until a few months. It is hard to play one game every two months so I am just happy that happened so I could come here and meet Julian and everyone here.
"It was a 50/50 experience. On one side I really learned a lot from Pep, he improved me as a player on the pitch and I have to be thankful also for the experience.
"On the other side I didn't play as much as I wanted to or I deserved."
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