Client Crashing.

My client has crashed atleast 5 times in champion select causing me to lose tons of LP. I have done everything possible to prevent it, from repairing to even redownloading league. This is a stupid issue that riot seems to not care about. It's not fair. Losing LP for a problem on the games side that I cannot prevent? This is stupid and needs to be fixed because I have been denied promos, denied promo wins, and just plain out losing LP.

Thank you