.Upgrading to better quality equipment than you currently own has been scientifically proven, over & over, both to improve your playing and to make you happier and more productive in all aspects of your existence.
There is no flaw to your musical understanding or deficiency in your technique that cannot be overcome by simply buying a new bass and amp. This effect is enhanced if the new arrival is in addition to your existing equipment, rather than as a replacement, and further optimised if the incoming equipment is purchased on finance