The A770 is actually fantastic, even more so for the price.
What was garbage was the drivers and they've come a long way in bringing them up to speed.
They had and to some extent still have a rather gigantic hurdle to cross getting older games up to speed, but the decision to employ at least partial Vulkan translation instead of trying to get DX9/10 drivers up to speed was a huge leap already.
For modern games, when they are at least tested to run on the Intel cards, they perform on par with cards from AMD and Nvidia that cost $150+ more.
And no, this isn't coming from some Intel fanboy, I haven't bought an Intel CPU since Coppermine and for GPUs I've simply switched between what was the best for a specific priceclass at the time I upgraded. And whenever something really new came along, like Kyro3D and PhysX cards (and now Intels GPUs), I bought those too.
Also realize that Arcs ray tracing engine beats AMDs and keeps up with Nvidias in their first iteration of the chip.
Their tech is sound and fully has the potential to be a competitor.