Mid/Jungle collapse on the Bot lane - can't do anything?

Hey folks, I'm a Support main and I'm losing games on the spot to this gank/rotation, we generally can't recover from the swing it gives the enemy team. I'm not sure if I described it well in the title, so this is the gist: Enemy Bot lane pushed us to the Tower. Enemy Jungler and Mid then come through our own Jungle and wait in the tribush for the correct moment. They dive us and trade Tower aggro (not that it really matters since it doesn't do much damage), and several things may happen:

If we stayed they get a Double Kill, a Tower, and a Dragon. We get one of them if we're lucky.

If we backed off they get a Tower and a Dragon.

If we don't make the decision to retreat fast enough they get the aforementioned Double Kill, Tower, and Dragon.

If our Mid or Jungle was privy to it and one came to help but not the other, they get another kill and if we're lucky again, maybe we do too.

Bushes are warded, we know it's coming. Doesn't really matter.

My issue is, every outcome seems to be a net-positive for them, even if we take a Tower in a different lane while this is all happening. I'm currently Unranked and I'm not great at the game, my allies are typically much better than I am, but even they can't seem to really deal with this. The enemy team however seems to always be doing this tactic. I wish I could just play against people near my skill level and not bog my better allies down with my shittiness, but I can't choose my teams and enemies and QM is hellbent on putting me in games I don't belong in. But I digress, that's another issue.

In no uncertain terms, WTF do I do against this? Game is going relatively fine then we lose on the spot from the swing it gives them. Thanks for your time.