Hi,
as already said, you need lots more hiding places, doesnt matter if these are plants or wood.
Here a few examples:
subtropical planted tank (as you can see there is a pair of sp. redfin living in this tank):
The tank is nearly double as deep as it is wide (220L) !
Another one, subtropical with only few plants but lots of wood, cork bark tubes,... my pair of asiatica live in there, the tank has a quadratic bottom (430L)
YOu can only look in there for the first 30 cm
So the fish have enough space (nearly half a meter twere they can hide and I cannot see them, they really like that !
Another one, same size as the asiatica tank, but tropical (P. obscura) More plants, but also a lot of wood, just ten cm behind the glass, the wood pile begins !
Lots of place to hide
And the last one, tropical too (350L) Channa luci inside. AFter the lighting did not work for a month most of the plants died, but as you can see, there are still a few left, and a lot of wood too, so the fish can not be senn if they do not want to be seen. There are minimum fife C. lucia inside, but I bet you cannot see anyone !!!