Well, yes & no.
Firstly OP, having one DC is easier than multiple - I've 3.
Secondly, my life is easier without my abusive ex, yes. However, he now has no contact with the DC & that means everything falls on me: emotionally and practically.
When they were very small it was the physical juggling eg one needing the toilet while another was in the bath or having a nappy change.
Now they are teens & preteens it's the juggling, the clashing matches & training. We do something every single night of the week & most days Sat & Sun. Sport is their thing, so I do everything I can to support them.
I'm absolutely exhausted all the time. I work f/t, and I'm glad I do, as there's actually a mental & physical respite with that!
But the worst part is the loneliness around parenting. I've no-one to share the load with about worries, big decisions, DC upset and so on.
I've no family support, know loads of people but few true friends I can open up to. Actually there's no one, bar my counsellor, I can talk to.
So while it's way easier without him - I'll never get over having to do it alone to this extent. I love my kids, we do ok, but it's stressful nearly all the time.