How to love my job again?

I need some advice on mindset.
I feel like I am stuck in a negative mindset and it is affecting everything.
It's been an incredibly hard 2 years personally, health wise, work wise and like everyone else; covid and a long lockdown etc.
I feel totally spent and empty. I used to go to work with passion, genuinely feeling like I had the best job in the world in early childhood education. It was fulfilling and rewarding.
Now it's just leaving me exhausted and feeling resentful. I work through my lunchbreak every single day, I stay back after hours most days but not as much as I once did. I bring work home.
My children have had a tough 2 years and I feel like I let them down as work comes first to make ends meet and because it demands so much of me.
I raise certain issues about work but feel as though I am a whinger and trouble maker as everyone else is so willing to do things expected that are outside the job description and pay hours. I was once willing but now see it's a damaging culture/ cycle and am just so incredibly exhausted.
The days/hours are perfect for my family verses finding other employment.
How do I love my job again?