HTC One M8 phones - well built but the software drags them down

As the owner of a phone repair store, I was impressed with how the HTC One phones were designed.  Some good engineering.  However, the software leaves much to be desired.  There is latency in almost every aspect of the phone.  It is very frustrating to text when the keyboard stops taking input and then suddenly leaps back to life two words later.  And there are times when the keyboard completely disappears.  After having the phone for a year, I simply hate it.