My client's being weird

Alright so my client's been acting up these past couple of days, first of all it's EXTREMELY buggy when i try to join lobbies, every single time something along the lines of the accept button not working or one of the people in the lobby being invisible or not even recieving the invite to the lobby at all.Now, it eventually works after about 15 minutes and i manage get into champ select, but after a few people lock in it will eventually reach one person who locks in and then the timer would reach 0 and it would just freeze right there, sometimes this happens before i lock in so i end up dodging because of it and i've lost about 15 lp in ranked games as a result, and sometimes if i've already locked in then the game would start and i'd still be stuck in champ select.On very rare occasions it will work normally, like yesterday and the day before i managed to play 3 ranked games without any bugs, but those were 3 games out of probably 7 or 8. It's really annoying, i've been on a ranked hiatus for quite a while, and after i've won a few games over the past couple of days it made me hyped to climb some more, if anyone has experienced this or has an idea on how to fix it please tell me.