I was on Ubuntu for a year. No major issues, although I used the interim releases, which are supposed to be less solid than LTS. Then, a couple of months ago, I decided to switch to Fedora, just out of curiosity. Many people stated how Fedora is rock solid, Fedora is the new Ubuntu, etc. First some rpmfussion updates broke mesa, then the ostree update broke Flatpak, and recently there was a broken kernel 6.3.11 update that affected some AMD users. A few days ago, I updated my kernel to 6.3.12, and I got frequent freezes on boot. Other users are also reporting such issues. So now I boot with an older kernel. Which is not optimal. There is no LTS kernel on Fedora, the old kernel version doesn’t receive security updates. Was it always like that, or it’s an unusual bad phase.
I’m using fedora as my work system, because I have a relatively new laptop that needs the new kernels. Haven’t experienced anything you’re describing. Are you on fedora regular or on sliverblue (the immutable version)? If you’re having issues running the newest kernel, follow the fedora documented way to build and run your own. I did just that when needed a prerelease kernel and it worked out fine. I usually upgrade to a new release by the end of the cycle, so that the new version had 6 months to mature. I never immediately upgrade.