Don't think I agree with the other posters on this one. scarcity mindset issues.
Ultimately its about clarifying what you need out of your realtor to set expectations. If they are a decent realtor they would show obvious signs that you will not work well together. A realtor isn't like a regular job, we get our license that teaches us how to not get sued then venture off to do business our own style. Some realtors see themselves as professional contract negotiators, some see themselves as deal finders, some as a guide, goal assistant, business partner, etc.
Since realtors deal in the realm of possible ethics violations, don't expect them to simply take advantage of a seller client to give you an under market deal with no competition. So, I would highly recommend you take charge of your own future and look for deals yourself but also find a realtor who is helping you in that search which it sounds like he is doing.
Another issue I take here is that you are looking for under market value from your realtor. If an under market deal hits the MLS then you are in deep competition with others which can then lead to the price climbing to near market value. If the realtor brings you one of their seller clients properties for you to put under contract at below market value then they are committing an ethics violation unless the seller knows they can get better by putting it on the market but decides to avoid that. So that leaves you with unconventional ways of buying like sheriff sales or preview status MLS deals. Since those are harder to avoid risk there is less competition, simple as that.
So, overall if I were the realtor analyzing your commentary I would have a goal setting and expectation setting meeting with you because the way it is now it would lead to disappointment. Personally, I think it sounds like the realtor is doing mostly fine from the little info you gave. The biggest issue is that you have to define what you expect and then think clearly if those expectations are reasonable.