Took me 3 months with no legendary, and that is intentional game design. Disappoint you with terrible rates and then offer the 'cure' in money packs. But not actually a cure, because that's just an additional shot at spinning the wheel. I made a video about how the company runs the game if you need a push towards quitting as I did. It's not the most concise or well thought out, but if you're still on the fence about quitting -
https://www.youtube.com/watch?v=EcS7vjLm0Ns
Also someone else posted this video somewhere else, which is a very concise video about mobile gaming and relates to Raid very muchhttps://www.youtube.com/watch?v=9Ywdh1on_HU
Once the gameplay gets stale, that should be the deciding factor of when to quit a game. Don't bother with all the new champions and other bait. It's all just shiny graphics with no substance that will amount to nothing in the long run.