Whatever you said, is partially true and I am sure Bitcoin will come out of all these problems and will remain the number one crypto currency. The congestion problem is far more complicated that what we think. Even if I am not a technical guy, but if you look at the some technical topics here, you will understand fully.

Yes, ETH and DASH is quick and probably technologically superior. Probably one of them will become the best crypto currency when bitcoin will not be minable anymore. But till that time, I am confident that bitcoin will remain number one among all other crypto currencies.