Wow sombra really is that broken right now

so, im in gold and I was wondering if sombra is so broken why doesnt anyone play her at gold rank ? so I picked up the main reason was to counter a deathcart bastion orisa rein etc … So I played her for one game like, okay countering death cart etc and then I started her playing her every game and lol and behold when from a zero to an almost 60% winrate after only a few games gain a ton of sr etc. But what bothers me about this is the development cycle of over watch this cant be fun to play against. The fact its been in the game for this long is honestly kinda of dumb. So I find it weird that they have they take so long especially when bastion was meta for about a week. They immediately change it back that’s tells me there capable of making balance changes faster but for some reason they arent because meta is precious and they don’t wanna upset it. While it is fine to do this it leaves players with a broken unfun game for months at a time causing there player base to drop cause of it