To answer your question with a question of my own: If you think that software/service X sucks, why not see this as an opportunity to do something about it? If X really does suck, and if the reason X sucks is because it's being designed/managed all wrong, you could make a ton of money for yourself by building a company around building a better X which doesn't suck. Build an alternative that prioritizes reliability over agile/fast-releases/new-feature-rollout, or whatever you think the problem is.
If you're right, if users genuinely care so much about reliability, if reliability is important enough to sacrifice feature-experimentation, time-to-market and development-costs, then you should be able to achieve great market success and win over the current unreliable dinosaurs. More generally, some other company/startup that espouses the above reliability-centered philosophy should be able to enter the market and start dominating it.
The fact that neither you, nor anyone else, has killed off the companies/services/products that you're complaining about, leads me to suspect that users in general are willing to give up some reliability, in exchange for other benefits like low price and novel features. I know I certainly do.