Thank you for your answer! No problem at all. This model isn't for bake. Despite this, what do you think about the number of vertical loops? In my opinion, 72 loops for such cylinder is too much, but without them, the shading looks really ugly.
Seems pretty similar to mine, but with less loops. Like me you also had the triangle in the main bevel. Continuing the loops makes it easier to work with; double loops also helps the shading (as mentioned in the vid - since things average towards a point, surfaces that are longer in one axis will need extra edges to…
Your missing two loops on each depression that would support the sides. Try slicing or connecting across edges to create loops first then extrude the required portions.
planarity is a new concept for me but while checking the support loops... i realised this deleting the two faces solved the problem. but i guess 8 edges were not enough for the hole, i had to increased the subdiv iteration from 2 to 3.
@just_dragos Either spread out the edge loops, or add control (edge) loops horizontally . This is a very common question, and there are 2 other images that have the same solution on this page btw.