Grieving and Mourning in Port Sunshine

Never done a film review before, but felt compelled to put something down to try and help.
As 44 year old that grew up in Glasgow and left in early my early 20s I always had an infinity with Welsh's novels.
Through the nightmares of marabough stork, the spiralling world of Detective Bruce Robertson and the exploits of 'Juice' Terry. But it was with Trainspotting that it all started. And even with the early stage shows I was hooked on the dark world of welsh's grim characters. By the time I heard that the film was underway I had already moved to London and was eagerly anticipating 'the arrival' from the posters.
And guess what? I came out of that first showing a bit bewildered. That's not an image of 'General Franco'. Mikes Foresters a wimp (sorry Irvine!) Renton from the stage is now the 'catboy' and where is second prize and the others?
But as a film, the pace the and the lines.....
'He's always been lacking in moral fibre..."
'He knows a lot aboot Sean Connery'
'That's hardly a substitute!!'
And the music score, from IPs intro lust for life through to pulps mile-end.
It just worked, it so worked.
fast forward 10 years later I'm waiting for 3 hours in the rain outside a bookshop to get a signed copy of 'Porno'. And I loved it.
So you can imagine the Anticipation I had when Boyle announced the return of Granton Star express and the first of the trailers started to appear.
In 2016 forget Bourne, Rogue one nothing else mattered and Stupidly I had built things up in my head to a level that that was never going to to be matched.
I was actually starting to dread it following the 'premier' comments that it does not disappoint. But as I sat there and watched things unfold from early on it felt laboured and disconnected. I just so want this to work.
I'm trying trying to force myself to love it, we trundle into the 1690 episode and what's Scotsman doesn't love a good sectarian joke & with sick-boy on the ivories. But it starts going downhill again an by the time we reach Marks updated choose life monologue it's there because it's expected. Nothing spontaneous and it's like the words are even dubbed. Where's this going? Spuds now looking more like the author of the skag boys and Franco has now started to monologue *beep* I'm losing this next minute we're going to see Mark 'hypnotising chickens.'
Amidst the final scenes we get a glimpse of a school playground and there's young kids that we start to recognise as once friends and I'm getting a bit choked up when the curly haired blonde kid appears in a freeze frame. it maybe tommy it may not. But it starting to feel like a funeral and I just want to leave the cinema now.
Is it the film, the stark reality of my own life in a mirror through addiction, bad choices and lost youth? Should it never have been revisited in the first place, are some things so good you should never ever go back?
2 hours after leaving the cinema I'm now sat watching there them running out of WHSmiths down princess's as opposed to choosing mind numbing spirit crushing game shows... just made it worse.
Days later and I'm still haunted by the film.
What's up with me? I'm not reading this from other fans?
Honestly I'm not having a go at the film, it's probably my own stupid expectations.
:(