Yeah, notice how all are in the same block. Once the first came through, all others came right with it. You should enable replace by fee (Settings -> Fees) as well as dynamic fees (same box) and check the "replaceable" box when creating a transaction. That way you can easily increase the fee in hindsight with electrum should you notice that it wasnt enough.

You have 4 in total, lets call them A, B, C and D. A and B pay 25 and 30 satoshi per byte, which is pretty low. C pays 80 satoshi per byte which is ok if you have some time. D pays 160 satoshi per byte which should get you in the next block (or a few more at max).

D cant get confirmed until C is though. Same for B (needs C) and A (needs B). You created a chain. As a single unconfirmed transaction D would have been confirmed already. Due to its dependency on the other transactions it is not. There is something called CPFP (child pays for parent) where miners analyse these chains and check for late transactions in the chain that pay a very high. Confirming these chains could be profitable for them if the fee of the child is enough to make up for all previous transaction paying a low fee. I think in your case its a bit low for that. It should still work give some time though.

They all require the first one to confirm and your average fee over all is relatively low for something like CPFP to woŕk.

I have a rig 4 380x + 2 390 - works ok. So check overclocking, power, all items in "troubleshooting" section of readme.