I've namechanged for this.
I'm at a real low ebb. I have two DCs - 11 and (just 13). I feel locked in battles with them over screen time and what they eat on their own time (at school, on way home when allowed).
I don't think we're particularly strict but neither are we totally hands-off. Both kids are very wilful and articulate and it's a war of attrition over the same stuff; time to come off the screen, don't go from gaming to your phone, don't ask for any more sugar etc.
For those who say just have rules and stick to it - it just doesn't happen. They always push back and because I'm a fucking idiot, I know I get really wound up and am probably too combative - but it drives me mad. Then we row. Then we make up. Then we promise change. Change doesn't happen. DP is much more laid back than me - he totally believes in the same stuff but he's just gentler.
The cycle is awful.
The kids talk to me about everything, we have strong bonds, but I worry these will loosen.
Please tell me what's worked for you. And please don't come on here and judge me. Really. I whip myself enough.