@MintJulia
My childhood sounds very like yours. One thing I am certain of is that you make your own happiness. Don't waste time waiting for your husband to make you happy.
Improve each day by 1%. Have music in the kitchen. Dance with your dcs. Lttle things like putting a hot water bottle in my bed or ds' bed ten minutes before we go up, feels like a luxury.
Warm hot cross buns with melty butter after school or a £1 bunch of daffodils for the breakfast table all raise a smile. Add in your new house and things could really improve 
I just try to raise an extra smile every day, It doesn't have to cost a lot.
I love this advice. Start by intentionally increasing your joy in small ways every day. Pay attention to small things like your favourite scent of soap or shower gel, your favourite tea or way of making coffee. Start the day by putting on your favourite upbeat music as you get ready for school and work. Wind down in the evening with comedy shows - IT Crowd, Parks & Rec, whatever makes you giggle. Look for feel-good family films too.
You can't change your own childhood but you have children. It's so therapeutic to have a good time with them. While they are still young spend at least half a day every weekend having adventures or outings with them. I got so much joy from taking my children to steam fairs, mini railways, theatre shows for kids, interactive museums and science displays, story readings, gamelans, visiting palaces and castles etc.
We also always did a seasonal bucket list - things to do in summer or at Easter or Halloween half term. You can find loads of inspiration of Pinterest. And get your children to compile the list with you (your husband too if he shows interest. Could be a great way of introducing more fun to all of you.)
Have fun in small ways with your kids too. It doesn't have to be expensive outings all the time. We went cycling and hiking in the local woods, built dens, dammed the stream, built mud slides, dug up clay, made pots and fired them. On rainy days we built dens from sofa cushions or a sheet thrown over the back of two chairs. We had teddy bears' picnics. We camped in our own back garden, built bonfires, made dragons out of twigs, had water fights, built snowmen and went sledging, made bug hotels. Inside, we baked cakes and cookies, played board games and card games, told silly jokes and stories, binge watched happy programmes together, played charades, made zip lines for Ken and barbie down the hallway, slid downstairs on old cardboard boxes. Once you start to look for ways to have fun with your children, new ideas keep arriving.
Meanwhile, you also need to do some work on yourself. If you weren't loved and appreciated as a child, you need to learn the skills of self compassion and self care. Do some little audits - when did you last get your hair cut, your teeth or eyes checked, your nails or brows done, go shopping for a new outfit or pair of shoes? Do you have a list of go-to things you do when you feel down that are good self care? From deep salt or bubble baths to comedy reruns, escapist novels, going to a dance class, baking bread, feeding the birds, sewing seeds and planting on the seedlings etc. I think a bit of art, a bit of sport, a bit of nature is a good balance.