Gameplay issues

I rarely say something when it comes to gameplay bugs crashes ect. But it's really starting to grind my gears how bad the game has been performing in the last weeks. I completed the Ultron Variant quest yesterday of should i say i tried to, since the game has been performing so badly. I had to restart the game probably 1-3 times while only doing one lane in the quest. You can see to how much it adds up to over the course of hours and hours. I wouldn't be mad if i would just do one path but when i use 30% & 20% + class boosts i loose a ton of time not being able to fully max out the value of those boosts, which costs me even more money. I don't even want to start with the lag and crashes where i also have to restart the game just to see my champs have half the health than they should have. I'm playing this game since the beginning and i spent more than a reasonable amount of money on it. I insist on a partly refund on what i spent, for this shady way of dealing with your customers. I don't want to contact apple, but it would make sense viewing it from the legal aspect.