Ha! I love puffin's honesty.
Some days are just worse than others. I find we might have a string of days that go smoothly, moments that I think "Wow, we've come a long way!" and then bam! Back to the same old struggles, just slight variations.
Sometimes it helps me to remember life with an infant. Some moments were sweet, but there was also a lot of screaming and misery.
Growth spurts, developmental leaps, etc. I have three kids, but I find that I still have to remind myself that when the oldest is being especially difficult that it might just be growing pains of a sort. And that I feel it too because she's not the only one going through it.
Hang in there!