If you cannot break a transport with CAU armor, you do it wrong.
Likely you try to do it... ... ... alone.
This is a multiplayer game. You might have realized.
Solo activity is not meant to be 100 % successful.
You complain about this?
A player that chose to fly not a 5ker (max profit+great dodging) but a heavily armed Btrans, who spent about 1 billion on safety equipment and who accepted a loss of a lot of cargo... to take part in a space shooter game and have a chance... this player can thrust ~20k under fire and thus perhaps (!) make it to safety, with guns snacced off, equipment down and barely flyable? Do you really complain about THAT?
What I call this is: a tense challenge.
One that is open-ended.
A good pirate gets me 1on1, even in my CAU8 Shire.
An moderate-inexperienced one doesn't often get me if I do not mess things up.
A bad pirate even might die to a battletransport.
So... I am a very experienced transporter. I sometimes win.
Ofc we need to nerf transports and armor, so that even the sucky little bomber can beat me, bc he is a bomber and I am a transport? Guess you found the irony.
Want to know the trick of how to push the scales into your favour?
Easiest way: Bring 2 bombers. A CAU8 Shire dies in less than 10 k. I was surprised myself.
Easy, but cheap too: Cruiser piracy. But you will die afterwards, likely. Most players don't like that.
Bit more refined: You might also think about your ship, loadouts and skill, how to use it and who you want to target. Transport =/= transport. But experienced pirate players ofc know and I won't tell here.
Now stop QQing and get a friend and fly together.
I get my traders together and fly as a team, too.
Why?
It's more fun and it increases the chance of success in a multi-player game.