TunnelBear

You can fix you PING problem with VPN but sadly riot client doesnt like VPN, so you need to activate it ingame. I diddnt found a VPN Service who work in the client and ingame. With CyberGhost or TunnelBear you can have a better PING ingame, but the client will not work. So you can only activate it i

For people wanting to use this with their mobile phone emulators like bluestacks or whatever, you can grab the same config file generated in the above URL and install WireGuard onto your mobile emulator and then load that same config file To turn on the VPN, just tick the slider ON in the WireGuard

Have you tried disabling some extensions? Some extension like tunnel bear would cause some connection issues. Like on tunnelbear-vpn extension would cause me unable to connect to the internet and almost lock me out. Also there been issues before on the twitch sub reddit saying because of Adblocker.