I've dealt with quite a number of Android tablets over the years. Out of all of them, I had one which ended up being a bit flakey over time and one with a weak USB connector, but I still managed to resurrect them. So, reliability doesn't really seem to be a huge concern.
What is a big concern is updates. Over time, many apps, especially media service related (i.e. Netflix, Hulu, etc...), just stopped working after a couple of OS version updates. And anything basic which didn't work well out of the box, never received any updates to fix those issues, leaving it in my hands to apply 3rd party firmwares and the like. The only one I have owned which didn't have these issues was a Samsung.
So, the short of it is, unless you like rooting, hacking and tinkering, stick with something like Samsung or some other big name with a track record of releasing timely OS updates for their devices. They cost more, but they are reliable, and an up-to-date device can mean the difference between having a secure and functional device over the long term and having something that sort of works and goes obsolete far before the actual hardware gives up the fight.
Just to provide an example, my daily driver cell phone is a Galaxy S10, which is fairly dated. But it has never been anything but perfect and still receives very regular and timely updates.