A good wardrobe is not defined by a particular number of pieces. It is one in which the clothes suit your actual days, work together easily and remain visible enough to be worn.
This edit starts with observation, not shopping.

Audit real outfits rather than individual garments
Photograph what you wear for two ordinary weeks. Repeated shapes, colours and shoes will reveal more than sorting every item into abstract categories such as classic or statement.
Identify the specific point of friction
A wardrobe can feel difficult because the layers do not work together, the shoes do not suit the day or the useful basics are always in the wash. Name the problem before assuming a new outfit will solve it.
Fashion Revolution · Fashion resources
Repeat a small colour relationship
Choose a few colours already present in your most-worn pieces and look for natural combinations among them. Repetition creates coherence without requiring a strict neutral palette.
Victoria and Albert Museum · Fashion collection
Alter before replacing
A modest adjustment to length, waist or sleeve can move an almost-right garment into regular use. Ask a tailor what is structurally realistic before giving up on a well-made piece.