Square does take action against botters if you report them. Once more I'm hearing nothing from you but shifting blame and salt. As it's been shown over the years, (Coming from someone who has played this game since the beginning.) They will speak up and do something once more than just the NA or EU player base says something, do you just expect them to answer every crying person because they feel entitled?
To implement an auction system would completely ruin the point of housing and the system they have in place. When people are having to pay well over what the plot is worth just to own it, less people would even have houses, that's not really a good replacement system. They made it this way so people couldn't flip houses for godly amounts of gil, which sucks yes and its not perfect, but tbh no game is perfect. At the end of the day its a game and if you have a life you wouldn't be crying in forums over something so silly. Friends can still be chatted with via discord, new friends and fcs can always be found. Grow up.