Why are there still consistent client problems

For 4 years now there is a new client problem every couple of months and its pretty sad at this point. Randomly get disconnected or some patch thing stops working and you have to relog.

Can make 1.x billion dollars in a year but cant even make the client that the game runs on to work smoothly.

No sandbox mode and billions of other things we ask for that is quite simple to a billion dollar company.

But hey guys riot isnt greed! :>