I’ll be honest, something feels off.
the torso is just a blob, seriously, it makes him look more like godzilla than tahtorak,
the feet are really tiny,
the head crest looks more like side frills,
the neck feels a bit too short,
the insect face just doesn’t work imo,
otherwise it’s fine, the limbs are alright(I mean you even got the grey legs),
the tail is good, it even has solid striping down the sides.
I would redesign the torso to shape it up on a slightly smaller scale to better fit the limbs, and give it a more solid looking back,
and make the head more resemble the original design.
that said, it’s not that this moc is bad, it just doesn’t feel like tahtorak to me.