Frizz depends on how you treat your hair, it can be frizzy at any length if it is damaged, dehydrated or brushed. Wavy hair often looks curlier as it lengthens die to the large pattern repeat.

Don't understand what you are worried about? Start caring for your hair like curly hair instead of straight hair (many of us follow the Curly Girl method), consider a curly specialist haircut (see salon reviews on the main NC site).
2a-2c, medium texture, porous/ colour treated. Three years CG. Past bra strap length heading for waist.

CO-wash: Inecto coconut/ Elvive Volume Collagen
Treatments: Komaza Care Matani, coconut/ sweet almond oils, Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss Ultimate Volume, various Elvive
Styler: Umberto Giannini jelly, Boots Essentials gel
Flour sack towel, pixie diffuse or air dry.
Experimenting with: benign neglect