What popups? Am I doing something wrong/right that I do not get those? What could you not do but now can?

Did you not learn anything because you simply did not need to, perhaps? Because you can do a lot if you need to.

But why put them in the hole? If you have no clean burning, the filter mostly gets carbon, which can be burned again. Some plastics like PVC release HCl, so you need to scrub that, but the result is harmless table salt. The biggest issue is formation of dioxins, so you need to have a high flame temperature to make sure everything burns clean. Otherwise dust etc. could contain heavy metals, but that is not directly from the plastic.

What do you mean with filters?

The polymer decomposes when you heat it up, yes. But you can also start from scratch, so to speak. But that is a more involved process. The same way you can reuse steel or melt it completely new.

This is actually incorrect, you can absolutely break plastic into its basic constituents and create new plastic. But that costs more than simply using already existing oil.

The cheaper downcycle method is roughly separating the plastics and using certain ones to make new items like plastic bags, buckets etc.

You operate a cafe and sell stuff that is trash 5 minutes later? You print a trash bin.

Yes, they are. But that does not make it better that there is no bin. I have been in a situation with no bin but trash that can not simply be carried (disgusting liquid) and had to dump it. That is extremely rare for me, I usually pick up others trash. But there are situations where you simply need a bin, no matter how green you are.

“the thief gave me money to shut up, I see nothing negative for me”

Ooof… Are you feeling better now?