Showering likely has something to do with it, especially if it's just your canopy. sun damage will too, and how often you have brushed/ combed/ heat styled since we are always likely to focus on the sections that show. Do bear in mind that frequent showers may have been the norm in at least younger US citizens for some time that has not been a worldwide thing nor the same amongst all age groups.
Plenty of childhood photos (including mine and I had no showers, just a weekly bath and a daily hairbrush assault!) or those of Victorian ladies right through to the 1980s (perms or natural) show major frizz. I think it's only become really socially unacceptable in the west since flat irons became mainstream - it has been suggested that Friends, especially Rachel, was the turning point. As we get older many of us want to wear our hair loose, not in a permanent ponytail or braid, maybe that means the issue of 'straight' frizz is more obvious?
2a-2c, medium texture, porous/ colour treated. Three years CG, growing out mechanical and chemical damage = breakage and very high porosity. Past armpit length heading for waist.
Treatments: Komaza protein, Komaza Matani, coconut oil with sugar syrup. Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss ultimate volume
Styler: Umberto Giannini jelly, Boots curl creme, Rockin RInglets
Experimenting with: Mega-Tek, Curl Harmony reviver, Elvive Full Restore 5.