Op I've been thinking about this thread all day but couldn't get back to it. My son is 15 and in the last two years every week and sometimes more he'd ask could he have a day off, saying he didn't feel well.
All I knew was that smiley happy go lucky ds had faded so much and didn't want to go to school. So we talked to him. Every time we said 'I don't get it' or 'I don't understand' he was gone. He'd walk off and go to his room. We argued and talked, speaking carefully, we lost it, we made so many mistakes
He never did homework or study. Never. The worst thing (we thought) was he's insanely quick to pick up on things and was heading for honours everything IF he had done any work (eg dh going through maths with him and he'd pick it up in an instant, teachers gushing but saying he had to put some work in and he'd be fine etc). The thing I didn't really connect was that just because someone shows aptitude if that isn't who they are it doesn't matter. Yes it's great to have grades behind you because the more you have standing for you the better, but it's not the only way at all.
The thing is we both went to university too and worked our asses off all the time and we assumed it was always a given all of our kids would do computers or the like like dh but then ds started showing a love for woodwork and he was so into it and put that with the amount of tech companies dropping people like flies, the amount of places that shut down over covid and added to that the amount of suicides and mental health issues I had heard of. It kind of showed us that all that matters is that they're happy and good people. That they keep living and like living. We asked for him to change some subjects, and he did and was so much happier for it. We threw ourselves into sitting with him playing fort nite and the like, doing board games, getting out places. We let him out with his friends more and the odd lunch time in school we threw him some money to go to the canteen. he still did no study and it's still a battle but now we nudge instead of push and he's back to himself, tells us about woodwork stuff which he's excited about, or technical graphics, talks more and doesn't stop going to school which is the relief to end all reliefs. I couldn't give the slightest about his exams now, he'll find a way to do something either way and even if he doesn't he'll still be here at least (we were that worried)
We know a number of people who have done what's called the applied leaving cert over here (leaving cert is the final exam here) which is more practical and so better for people who find it more difficult to just learn off reams and reams, you can also leave at 16 and go into an apprenticeship. Best of luck with it all, I hope that no matter what you get your little boy back. It is so hard. Take care op and sorry for the lengthy as just to let you know that someone else went through somewhat similar and came out the other side (kinda!)