Well done for coming back so quickly glad - agree with everything said by the others, you are back so soon because, just like your user name indicates, you feel better this way.
I'm not sure what to suggest re. counting the days. I count the days, but only in that every now and then I look at my app counter to see if I'm near a big number yet so I can justify a sober treat 
... it doesn't have to be a trudging onwards burden, but I'd say if in any way you think it's holding you back then maybe try doing it differently this time.
It does sound to me though as though this might be something that mentally you haven't quite embraced as a part of who you are going forwards. I think if it feels like a temporary "I'm being good at the moment" shift in behaviour then there's an inevitability to that coming to an end - even if it is only temporary. What seems to be happening is that you get (as you call it) "complacent", then have a short period where your drinking reminds you that you can't moderate, that you're not able to drink in a way that works for you, and you're back here relatively quickly. Maybe this time something needs to shift mentally, maybe this is the slip that will help you to accept once and for all that sobriety has to be part of your life, that it isn't optional because the other path over the long term doesn't bear thinking about.
Just my two cents. As others have said, we're all the same, and none of us are perfect. So far the only thing that has kept me from relapsing is the acceptance that it will never end well. Once I'd accepted that I wasn't a normal drinker, and that it's literally physically impossible to sit next to a glass of wine and sip it nonchalantly with a genuine 'take it or leave it' mentality... well, the only way to achieve peace, for me therefore - is to give it a wide berth.