Seriously though, I do think you are lonely and grumpy and it's understandable.
I am in a similar situation to you it sounds like, so I know where you're coming from. The difference though is that your DH sounds unkind and self centred, and this makes all the difference.
In general terms and leaving aside the DH and the hobbies for now - it might be useful to let go of the desire to "make memories" (hate that phrase!) or seeing the goal the whole family together. At this age the DC are more independent and getting ready for adult life, doing more, out socialising more, hopefully studying, maybe working and it's going to be hard (as you know) getting everyone at the same time.
I would concentrate on building/strengthening your relationships with your DC individually, as they soon will be adults and your life will be like this permanently (I have teens/older teens and young adults and have realised this recently!). They will also like/respect you for this as they will know you are treating them as individuals in their own right, and you can engage with them with stuff they like themselves, rather than trying to find common ground between you all or get everyone round the table at the same time! Each DC is going to have something they are particularly interested in - skincare/health/peaky blinders/cooking/Netflix/nandos/fucking Snapchat filters/talking incessantly about their mates
and if you can encourage them to share this with you, it may help you feel closer to them. There is no avoiding it - you need to have Netflix and Snapchat to maximise your chances here 
I cannot physically do a lot with my DC who are active, and I often think I "speak" to them more on Snapchat/texts than in RL! BUT we laugh a lot and I know what's going on with them, and I have a lot of contact with them even if I believe they have rabbit ears on thwir heads It's not ideally how I would do things, but we are where we are. We also FaceTime, which leads me to the hobby thing... (apologies this is a long post I know)
My DH (out of necessity) is the chauffeur/watcher/organiser/practice person etc for a hobby of the DCs which takes up a lot of time and travelling (not that outing to say football,
but not kickabouts in the local park) and it really saddens me I don't get to share that, and I feel left out and a spare part sometimes.
What we do is, occasionally I can go in the car and sit with my book, so I get the journey time there and back. If I can't, my DH will FaceTime briefly when it's possible (I know this may not work for your circumstances) and if not, I am treated to a very very long blow by blow account
when they get back/via text in the car. I also look at things related to this on the news/web/club updates etc so we can discuss stuff. I don't feel so left out then, and indeed as they grow older I know this is how the relationship will be in future, they may not be sitting on the end of my bed talking to me like they do now, but at least they will be contacting and communicating with me as we have done the groundwork.
This is already getting really long and possibly boring so I'll stop
but hopefully it may be interesting, maybe a little helpful. The realisation that it's not so much about The Family but my relationship with my Dcs individually really helped me recently. Plus it makes times like Christmas when we are all under the same roof (and that won't always happen either!) even more special.
(Your DH is a whole other post, he sounds like a selfish uncaring twat, frankly. What would he say if you suggested the FaceTime/photos thing to him?)