When you start vocally defending them, you need to reflect on what you're defending.
Do you fundamentally understand why the local suppliers have to mark it up? That the EU retailer has to pay their people a minimum wage, with taxes. And those taxes pay for all the laws, courts, infrastructure, armies that make your life possible?
Temu is taking advantage of old shipping laws/agreement which make it cheaper to ship from China, tax free, than to ship locally. Your local supplier is in fact, in a tiny part, subsidizing Temu to send those packages.
They don't pay pensions, or worker safety. They don't have to make goods safely and risk death or permanent maiming with their products or their manufacturing processes.
So in essence, you're basically exploiting your local shippers and foreign workers for cheap goods. It's you, albeit in a tiny part, who exploits them just as much as Temu.
Yes, I think we all don't really consider it, but that's what's actually happening.
The law's actually about to change in the EU. Potentially these cheap parcels are about to have a flat fee of 2.25 EUR added and no longer be exempt from duty, so you might soon start seeing the true cost of those goods soon that everyone else was paying for you.
https://www.reuters.com/business/retail-consumer/eu-eyes-2-e...
Due to the complexity of real world systems, parasites appear. You've been supporting one of those parasites with your purchases. That's not a conscious choice on your part, I get it. We can't go through life and see all the little parasites and injustices the world and its complex systems make and stay sane.