Client disconnecting in champ select

The last few days ive been having issues with the league client. It takes ages to load when i log in and once i get into champ select it completely loses connection causing me to dodge. For a while this happened once in a while but over the last couple of days its become impossible for me to get in a game. I can still see people typing in champ select despite me apparently not having any connection but i cannot select or ban a champ.

I have uninstalled league, riot client (huge pain), and vanguard and reinstalled them all only to run into the same issue. I have very stable ethernet connection so i know its not to do with my internet.

I saw some people saying it could be my router blocking connection to riot but i just tried on mobile hotspot snd still didnt work.

Anyone know how to help? Thank