Came here to say this. I have a few of these. They are rock solid and easily flashed with Tasmota

Former Mikrotik CRS-310-8G+2S+IN owner here. This switch works as advertised and always provided very reliable speeds but I found the learning curve for the Mikrotik interface pretty steep. I have no formal training when it comes to networking but learned a lot watching The Network Berg channel on YouTube. I think the Mikrotik line will serve you well if you want to take the time to learn how to maximize the performance. I bought mine on eBay and BH Photo Video has some models as well. Good luck in your search

I picked up on one of these and it’s been pretty solid for the most part https://a.co/d/gaLPokJ I tried fully kiosk but had similar issues to yours so now I just run the home assistant app with a dashboard I created using the wallpanel addon https://github.com/j-a-n/lovelace-wallpanel and am very pleased! If you sprung for a slightly nicer android tablet, your experience would likely be even better