I think its harder after every relapse.Not necessarily the cravings but the mental impact. For me the first time I quit I had confidence and belief I could do it. After each slip I felt guilt,shame,hatred,anger and fear fear fear. Fear that I just couldn't do it,fear of even trying again,fear of failing again,fear of everything. Each time it took longer before I committed to stopping again
The physical side is harder too-google "alcohol withdrawal kindling"