I have deleted the only launcher in my tablet, now it won't work. How can I fix this?

[AC Question]

I got a Rockchip rk3026 tablet with Android. I had been suspecting for a while that the launcher was infected with malware or was not reliable, so I used Kingoroot without actually understanding very well what I was doing and I uninstalled the launcher (I couldn't activate the launcher I installed). When I restarted the tablet, I couldn't use anything except settings, so I made a factory reset, but it didn't work. It doesn't have bluetooth to send an APK of a launcher and install it. I know it was a foolish thing to do, but I don't have any experience with it. I would be very greatful if You could help me to solve this.