Disclaimer: I do have a 6 week old so I realise it's still relatively early days, but I had the same problem when it was just ds1 anyway!
I just feel like I can only ever manage to get one or 2 things right in a day, so eg
I've not been grumpy and shouty - but ds1 has watched far too much tv
I've cooked a lovely nutritious meal - but I've hardly played with ds
I've played with ds a lot - but he's basically eaten crap and ds2 has cried a lot
I've had lots of cuddles with ds2 - but ds1 has been abandoned to play on my phone
Etc etc etc
How can I do better?