Blaming game launchers on Steam is like blaming streaming becoming unusable on Netflix. They were having success being (probably) the first ones to do it and when other companies saw that they tried to copy their success, only to find out that what made the original product successful was that they were the only ones doing it and that was (unlike the new landscape the companies just created) incredibly useful.

The sad fact of the matter is that while having a one stop shop for anything sounds great, once a solution in a certain field gets successful the other companies trying to achive the same success will fly in like vultures and make it forever impossible to have just one service that unites everything into one neat package.