Then you'll either have to jailbreak or get a tablet with a different OS, probably Android.
Apple: They make most decisions, usually pretty good ones. You have to live with it.
Android: You can make most of the decisions, and once you start doing so you generally have to make all those decisions. The results depend on your own ability to combine and balance the features.
Apple: Easy to use and learn out of the box, and for the most part excellent results.
Android: Out of the box performance and UI depend on who you buy it from. Results are mixed (my experience), but can be tweaked to near Apple (or better in some cases) performance levels, if you're willing to put in the time and effort to learn how, and tweak, tweak, tweak.
Much of Android's tweakabilty can be had if you jailbreak your iPad. Some even consider it a better experience than tweaking Android.
Everything in technology is trade offs. Android's flexibility comes at the expense of performance. It take more powerful processors and RAM to get most Android devices to perform as well as an iOS device. Apple's performance comes at the price of customization. Every little thing you add to an OS, especially alternate ways of doing things, means more tasks and longer strings of actions for each task. Being able to add parts you want means part of the OS has to be written to re-point everything to whatever different thing you added. Apple's one way means they can tweak all the software to the minimum, improving speed, RAM usage, background efficiency.
Some people love Android. Some love Apple. It's just a mater of taste. What you can't get is the best of both. Technology isn't quite that good, yet. At least not the tech that ordinary people can afford.