I haven't used CMC for a long time because I prefer to immediately see the price situation in the market because in my opinion CMC is late in updating prices and sometimes not the same as market situation
Not all coins are listed on CMC and even old and existing coins aren't shown up. CMC price doesn't matter cause we actually wanting to know the exactly in any exchanges as there is an actual trades happening. Any price fluctuations happen doesn't appear directly and tales a while before it become updated. So no worries about CMC.
I also still use CMC to monitor the market and I think CMC is fine. I think CMC is like the parent market because it considers the prices of many markets and determines it so sometimes the prices differ slightly or sometimes CMC is late because CMC displays average prices.
You should stop say a bullshit about CMC. CMC has a problem when there was a scam that disappear and they must remove it from the overall total coin in the market.
CMC is a bit different compared to the coingecko.