Issues with water drainage & waterstop in new bathroom reno

[Sunflower1]

I'm after some thoughts/ opinions about newly renovated bathroom in a 1970s unit

1. Am I correct in thinking a piece of water-stop is missing where tiles meet cavity sliding door?

2. The floor falls from shower door towards bedroom door (will be carpeted), & water escaping from shower pools near bedroom door. No drain in bathroom floor. Builder said it falls this way so cavity slider door fits over tiles.  A water bar installed under shower door. Water sometimes leaks through vertical openings beside door.

3. Decorative trim on shower hob creates barrier preventing drainage, even though fall on hob is correct. Water drains from small section where tile sits proud of the trim.

TIA for advice on whether these are faults, & on possible solutions.