Is recovery from CTE (chronic telogen effluvium) uncommon?

My shed was VERY high for only the first few mos of hair loss, then leveled off eventually to around 150-200 hairs/a day, with random spikes of higher losses. Is this shed still too high to regain any density? I'm now in my 23rd month of loss. I saw regrowth after about 1 yr, but now trending to diffuse thinning all over the head again, with no obvious AGA pattern. I've read CTE reaches a setpoint & remains there. Does that mean it never ends & hair does not recover original very thick density?