If you get nervous, the main thing you can do is more interviews. My personal anxiety peaks right before the start time, luckily my bathroom is next door to my office! But after doing dozens of interviews I settle in once it gets rolling.
If you hate leetcode, well just get good at it. Yeah it is kinda dumb but it is straightforward to practice. And there is a lot more to a leetcode interview than knowing tricks - you need to communicate well.
Take homes? Yeah they are time consuming. If you really need a job do them, otherwise pass on the company!
Overall as a candidate you really need to try and go one level up on selling yourself - not just why you are a great candidate (which you are of course!), but why you would succeed at this role in particular.