Your expectations are not too high. That looks like apprentice work and you are paying for professional work.

Was the tiling done over new walls underneath? If so, it’s the builders job to make sure the wall is plumb and even enough to tile on. Is that a broken floor tile? That should not have been laid. There are applicable Australian Standards. They are available to the public but they cost, which is ridiculous but has been that way for years. I can’t post extracts due to copyright but you can Google. The AS2589 requires that the wall has less than 4mm of variance/bow across a 2 metres spread. You can measure this with a straight edge/spirit level. This is most likely the cause of uneven tiles although if it is isolated tiles the cause is probably too much/uneven adhesive. AS3958 requires that grout lines be even across the whole surface when viewed normally eg from the doorway with the light on. The width of the floor grout lines should be between 3-6mm depending on the type of tile used, and the wall grout should be between 1.5 and 6mm again dependent on the tiles. The same Standard requires the grout to be uniform in colour, smooth and without voids or pinholes. Be aware that removing tiles is likely to damage any waterproofing and that needs to be part of your discussion. Hope this gives you some pointers to discuss with your builder/tiler.

THANK YOU! This is exactly the kind of information I need. The walls were not new it is a 70s brick built house. But if you mean bare walls with no tiles? Then yes, the whole bathroom was removed previously. Its random uneven tiles, some of them look ok.

yes that is a broken floor tile, there are also a couple of spots on the floor where the plastic spacers are poking out too... these were also a problem on the walls.

The apprentice came back and removed and replaced 5 chipped tiles already but those were outside of the waterproofing area. I had not considered the damage to the waterproofing :(

Apparently it’s the quality of the grout I gave him (was sold to me and recommended by the tile shop- the tile shop the builder who recommended him uses)😕

That sounds like an excuse. He should have raised it. He has to guarantee his work

That is always the risk you take when you provide materials. The product won’t impact the thickness of the grout lines - that is a laying issue as is the unevenness of the tiles.

Yes it is hard to see the unevenness of the tiles in the pix but I can guess what your looking at. The grout is uneven widths too and the tiling is very poor job. Make sure the builder is aware of all the things noted here and replacement is the best way to go to me... I do not think this can be rectify by swapping out one or two tiles.... You are paying for a professional job not the apprentices learning! Cheers Margot