Garry Kasparov had to face a similar situation when defeated at chess by Deep Blue; However in the long run he used it positively to advocate for a hybrid type of game where a human and a machine collaborate in playing against another (human, machine) pair (see https://en.wikipedia.org/wiki/Advanced_chess).
As an aside, there are inevitably more and more things for which even the very best are not sufficiently intelligent _alone_. However, we are social creatures and we collaborate (typically with other intelligent humans) to achieve things we wouldn't have managed otherwise (think just at the space program as an example). So... we only have to adjust a little to accept that we could also collaborate with machines in the future.
In Go and modern Chess, computers don't need human help for the game-related part, as long as they have sufficient computing hardware and energy. That's what AlphaZero showed.
As an aside, there are inevitably more and more things for which even the very best are not sufficiently intelligent _alone_. However, we are social creatures and we collaborate (typically with other intelligent humans) to achieve things we wouldn't have managed otherwise (think just at the space program as an example). So... we only have to adjust a little to accept that we could also collaborate with machines in the future.