It's too expensive because you can't afford it, and crazy to have to penny pinch in Jan to pay off Christmas, and to eat into savings which are earmarked for something necedsary.
Your kids don't need an expensive tree, garlands, new decorations, new clothes.
I was a single mother with a mortgage when kids were small, so I know it can be a struggle, but going into debt would be crazy.
We made miles of paper chains for decorations, paper snowflakes and snowmen out of cotton balls. We didn't have gardands or wreaths, as i'm nowhere near a decent crafter. My DSis brought us to a local panto as a family Christmas present. I got presents for my kids, but they knew that Santa wasn't able to provide laptoos or huge lego sets etc. but we were in no way deprived, still a couple of tins od roses, bottle of Baileys, made tons of gingerbread men to bring when visiting friends and family.
I had no shame about being a bit broke, so no one was expecting me to turn up with a bottle of champagne.
Kids older now and I'm working full time so financially lots more comfortable, so kids presents more generous, but I don't feel Christmas is better now.
You should wait till you can afford to have the picture pefect Christmas you want, you don't have the money now, so focus on making it fun and cosy and happy for your kids.