You are not addressing anyone from Apple here.
We are all users here, just like you.
Have you tried a hard reset of your iPad by holding down both the Home and sleep/wake buttons simultaneously until your iPad goes to black and restarts with Apple logo, then release the buttons?
If you don’t care for the new, default iOS 11 onboard keyboard, there are lots of third party virtual keyboards you can download and install from the iOS App Store.
I use a third party virtual software keyboard called PadKeys.
PadKeys
https://padkeyskeyboard.com/
PadKeys Keyboard for iPad by Natural Designs Software, Inc.
https://itunes.apple.com/us/app/padkeys-keyboard-for-ipad/id975022995?mt=8
You don’t have to turn EVERY feature OFF just the right features need to be tweaked.
You can leave WiFi ON.
Bluetooth is more problematic on any iOS, so only use Bluetooth when you need it, and turn it OFF when you don’t.
In Settings app, General settings panel, turn OFF Background App Refresh.
In Settings app, under General settings, Reset panel, at the right bottom of the list, Reset All Settings.
In Settings app (NOT from the iOS Control Panel) turn OFF Bluetooth when not using any Bluetooth devices.
Also, in general, if you want a faster IDevice, on all of my iDevices, I turn off most of the iOS motion graphics eye candy, by simply turning ON Reduce Motion in Settings app, General, Accessibilty settings.
Make sure you aren't running scads and scads of background apps in the iOS 11 Control Panel/App Switcher.
Also, make sure you don’t have scads and scads of active website tabs running in the web browser.
Tap on my link below to see my other iDevice/iOS tips for a slow device.
Slow iPad on iOS 9, 10 or 11!
Also, send feedback about your iPad issues here.
iPad Feedback
http://www.apple.com/feedback/ipad.html
Cognizant Apple employees read ALL feedback generated from all of the various feedback pages and transfers the data to the , responsible Apple teams and personnel , but NO Apple employees will ever respond with any type of direct, individual replies from the feedback you post.
Good Luck to You!