Feel that these teenage years are way harder than newborn/toddler and any other stage? It was starting to get easier, they were pleasant, a little more independent, my working life getting easier as i wasn't stressing re childcare and after school pick up's constantly.
I have a teen never wanting to leave the house and one never in it. Both on insta, Snapchat and YouTube. One fortnite obsessed. School holidays I'm sick of them been up while 1/2am on phones so have made them leave them on charge in kitchen from 11pm and it's the worst thing ever. I try to reason with them but their attitudes stink so I end up arguing with them and saying what I swore I'd never say "while your living under my roof you will do what I say" 
I want them to have their freedom but I'm scared of them going off the rails. I don't want thwmnon SM/fortnite all time but I'm scared their mates will take piss of them when they aren't there after a certain time at night. I'm scared they will end up with MH problems. It's just all so hard knowing what the right thing is to do!!!
Obviously all their mates can stay out till whatever time, go on phones when they want etc etc (I realise this is probably not really the case but this is what they constantly throw at me). We work full time as we have to and I constantly feel guilty for that as well as they have been alone a lot of hols as spending time with grandparents is "boring" now according to them!
Sorry for the rant, would be nice to hear other people are in the same situation though