Was it problematic? I don't think so, threat of non consensual and self harm are drama, bl is life, life is drama. Some of the acting could've been tightened up, less of the main song repeat and for the love of... lose the 'funny' sound effects (or at least keep to a minimum) - and the Tart storyline seemed to be there because they wrote the original protaganists out. I feel like his part was maybe his original friend who slept with his boyfriend but (badly) recast.
I also thought there were a couple of warning signs about Dino being too possessive but then understood that was actually what Rak wanted after his previous relationship - just by a couple of things he says to Dino (calls him Daddy, warns him off Please, tells him he submits to him - paraphrased).

I thought the chemistry was off the charts, not just between the two main leads but it felt like everyone really were best friends off set and that came through in the scenes and I can live with heart felt acting that might be less professional...
Though in all honesty it was the last two specials that made me re-evaluate the first 8 episodes in a more favourable light (not seen the Vietnam episode yet).

Solid 8/10 for me.