Getting ridiculous

okay, so I have been playing league of legends since season 3 and until this season I haven't run into so many problems. I was just in a game when all of a sudden the game decided to just crash. and then when I loaded back in I get this black screen that just sits there until about 5 mins then another error pops up. this happens more times then it should and ive gotten so many damn 20 min wait bans because of this. I go on the forums to see people with the same black screen issue but none of them are addressed. this issue has caused me to take a break from the game many times. and at this point im just ready to give up. fix your damn stuff riot.
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