optimized Hair Filter for level access shower drain

My Parents home was renewed and they have got a modern level-access shower.

The Drain area of this Shower is covered by some metal Frame Design cover.
To prevent blockage there is a Hair Filter placed under this cover.

The design of this Hair Filter is not very clever and it has to been cleaned each time after a shower. If it is not cleaned each time and there is a woman with long Hair in Household the filter will block and the drain will not work anymore.

Problem of actual Filter is t