Those that passed their interviews at FAANG, did you ever feel ready?

I have 300 questions done over last 5 months (was a Leetcode virgin). I can solve the easier mediums & medium mediums pretty quickly now, harder mediums and above still cause trouble. Google phone screen in 1 week. Trying to grind as much as i can till then but every question i fail to solve, is taking a massive hint at my confidence. The more questions i do the more i realise there is always some pattern or problem or topic that i am not very well prepared for. I start feeling down thinking i wasted 5 months doing this. As a result i keep having this thought at the back of my head that i am not ready. But is there ever a time where you get read? 300 questions in 5 months is a lot, I sacrafised alot to be able to do this many while working full time, I can't and do not want to do another 300 for another 5 months to feel ready. Just feeling disappointed with my self honestly. When i started grinding I had this image in my mind in 5-6 months Leetcode would be a piece of cake for me. It just seems like the hiring bar just keeps getting higher and higher and solving mediums is not enough anymore we need to also know how to do hards. So my question to folks out there, did you ever feel ready before an interview? If so what made you feel ready?