My hair is trash honestly

So I have naturally dark hair, it’s always been curly and along with that, you get the frizz. Also, I’ve had it long my whole life. I went somewhere to get an ombré, or balayage type deal and now it’s dry and even more frizzy at the bottom. I’m literally threatening to cut it off because it’s so annoying. Even though it looks great, it doesn’t feel good and I have it up in a bun half the time because it’s so unmanageable. Should I just cut it off and accept that I can’t dye it, or is there a way to help it. Trust me, I’ve tried every anti frizz serum under the sun.