Ipad constantly saying „Not charging“ no matter what cords I use.

While not doubting that you have an unresolved issue, the problem that you describe is by no means widespread.

Your iPad indicating that it is not charging generally suggests that the Power Adapter is inadequate to charge the iPad, has a fault, or is unsuitable. You may have tried some of the following already...

These support pages should help with troubleshooting battery and charging issues:

Charge and monitor the iPad battery - Apple Support

If your iPad won't charge – Apple Support

Troubleshooting generally requires substitution of the Power Adapter and cable for another known-good item. Most models of iPad require a Power Adapter rated at 12W (i.e., 2.4A @5V) or greater to reliably charge. 5W Power Adapters (1.0A @5V) intended for older models of iPhone are inadequate to charge an iPad; if the iPad charges at all, charging will be very slow. Many recent models of iPad are supplied with an Apple 20W USB-C Power Adapter.

Some third-party USB-C power adapters (and portable PowerBanks) may not support USB PD (Power Delivery). Power Delivery mutually negotiates the charging voltage; the source, load and cable are all elements involved in the negotiation protocol. Unless the Power Adapter explicitly supports USB PD, it will almost certainly fail to charge the iPad; proprietary charging standards, such as QC (Quick Charge), are not supported.

If you continue to experience difficulties when using an appropriate Power Adapter of 12W or greater, you might be best advised to seek assistance directly from Apple Support - and request a remote diagnostic test. You can contact the Support Team using the Support link at top-right or bottom-left of this page. Alternatively you can initiate and manage your support cases from Apple devices using the excellent Apple Support App. If not already installed, the App can be downloaded from the App Store:

https://apps.apple.com/app/apple-support/id1130498044

You might also visit the Genius Bar at your local Apple Store or Apple Authorised Service Provider (AASP) - where the technicians will be able to hands-on test and assess your iPad, Power Adapter and cable(s):

Genius Bar Reservation and Apple Support Options - Apple

That sounds like a problem with the port on the bottom of the iPad. Using a bright light look into it and very carefully clean it out with a toothpick, being careful not to damage any of the pins.

It isn’t the update; if it were you would see tens of thousands of posts about it. It’s most likely a hardware problem with your device.

Have you updated to the latest version of iOS? 26.2 is at least 6 months old.

Yes, but what is “many”? And how many have the same problem? There are 1.5 billion Apple devices in use, so “many” would have to be in the millions if it was a general problem. With 1.5 billion no matter what symptom you have there are certain to be others with the same symptom, if not the same problem.

I have sympathy for your problem and understand your frustration, but there is no general solution. Make a Genius Bar appointment and demonstrate it to an Apple technician. That way they can’t ignore it. Don’t let them do further remote diagnostics.

...especially after paying $500 for you to break it in an update.

Remember, you are addressing other end users her, not Apple. Apple does not participate her in other than a moderation status. We broke nothing.

Your iPad is still under full one-year warranty. Take advantage of that coverage. You will get no traction complaining here.