Works for me without that issue on multiple Windows computers. Some ideas… maybe you made a bad upgrade; try reboot, uninstall, reinstall.
Maybe Windows is installing updates in the background while you are using Shotcut now.
Try with Windows Display Scale 100% if you have not.
Do some troubleshooting.
Download a recent previous version such as 22.04 as portable and compare.
There are about a million downloads per month with the vast majority being Windows. Surely if it worked as bad as you claim there would be more complaints.