A few random thoughts:
A living congregation will have members at many levels of understanding/commitment. The preacher may have a reason to serve the milk and withhold the meat.
Churches often have smaller groups, both as Sunday School, and as other meetings thru the week that can delve into subjects at more depth.
If you church is not feeding you spiritually, you might try to feed them (host a study, If you feel unable to lead, maybe you can find someone who is willing).
If your church (including others in its congregation) still does not serve you, wish them well and find another church.
Then there is the old joke about a preacher that preached the same sermon week after week. When the congregation asked him about it, he responded that when it appears by their actions that the congregation has heard his exhortations, he will change the sermon.