Should my boss be mentoring me?

[MrBaker]

I am a Warehouse Manager, and I work directly for the Ops Manager. We had a disagreement a while ago during my annual appraisal, where he said he thought I was underperforming (despite my department meeting or exceeding set targets all year). This was based on my lack of process improvement ideas.

I pointed out that all of my studying has been self funded, and that the company has only given me 2 days "training"(moving into management course) since starting out as a General Operative at the company 9 years ago. I have been a the manager for 5 years and studying for 3 of them.

I suggested that as my manager, he should be mentoring me and teaching me new things. He disagreed and said for the salary I'm on I should figure it out for myself.

I understand that we all need to continue to invest in ourselves to stay relevant in our roles, but I cant help but think his response is just lazy management?!

Thoughts?