Monero has a whole series where people go over it's flaws one by one called "Breaking Monero"
It also has a history of constant improving (RingCT, Bulletproofs, Dandelion, etc). Latest massive improvement on the horizon is FCMP which removes the flaws of ring signatures (sender privacy) and goes from 1 of 16 to 1 of the entire chain
I don't think anyone is getting comfortable