sometimes you manager is actually trying to help you, sure it's not purely altruistic but is anything? you own the burden of responsibility for achieving your dreams, your manager is merely a facilitator that can sometimes help you achieve that. when you delegate your future, it's your fault.
"I want to learn more about forecasting models". Understand that your manager has many contradicting tensions and they are trying to balance them all. Is this delivering business value or aligned with company goals? It's ok if not, but expect other things to keep being prioritised over it. How many growth opportunities did you find that were denied, or did you not find any?
Take responsibility for yourself.