To correct any misinformation in this post- what you have is porcelain tile installed very, very poorly. You can install tile in this pattern- it is not an issue with tile. However, what’s underneath is very concerning. I have never seen that much mortar used.
You need to get a professional in, even if to look at it and give advice. My guess is if they used that much mortar, it would all need to come out and actual cement board would be needed as a base to bring the flooring to the appropriate height.
I actually disagree with this, only because the flooring is tile, not LVP. Tile can be installed in this pattern, and it is actually recommended to have no more than a 33% overlap with rectangular tiles to prevent slippage in installation.