Crankbaits naturally lend themselves to chuck-n-wind, which is great... when it works. However, a crankbait, like other lures, is not "food". The lure has to do something special to draw strikes much of the time. It's called triggering. It's always nice if you can find aggressive fish that will meet you half-way. Cover water and put the clues together: find bait, find bass, find feeding bass. If you think you are only on the first two -the bass won't meet you halfway- then you may have to employ more triggering.
You seem to be afraid of the brush, which is understandable! It could be you are fishing a bit far from where the fish actually are though. You can fish cranks in brush if you fish deftly, crank down easily until contact, then gently walk the crank through with the rod, not the reel. If you hang, slack and let it float up a bit. If still hung pull easily but firmly and it will likely roll past the hold-up. And...get a plug knocker. Fish easy and deftly, like fishing a jig. Cranks can do that, and should much of the time.
Contact also allows you to trigger strikes from reluctant fish. Accelerations and direction changes, crashing bottom or cover, and ripping free of cover edges (don't do this in the middle of cover!) are strong triggers.
Lastly, or maybe firstly, angles can mean getting the lure to the proper depth and keeping it there, or in the sweet spot, long enough. It can mean paying attention to subsurface currents that position prey and bass in a certain orientation. Fishing across current, or down and across is often best. Each spot can be different due to current directions and topography.
Remember, you are fishing a crankbait, not just "cranking" it.