I'm losing LP because of my client!

Every single day, when I try to play League I encounter a problem where my client completely starts lagging while I am in ranked queue. I can't even click my character, ban, or even lock in. It's either it crashes, or just lags and freezes on a certain screen. I've started to lose LP constantly due to this issue, and at this point it's too much and the dodge timers get longer and longer each time. I restart my client it begins to happen, I delete my client to reinstall, it still happens. Does anyone know how to fix this issue?