Tweak metronome to go even slower.
work in chunks using the rule of five.
Reframe your practice to enjoy the process.
start detached from rhythm slower than metronome, then add back in when in control.
Practice as slow as necessary to get things to go 100 percent right.
work through vocals in phrase chunks.
Practice phrase chunks extra slow without metronome to start, then add metronome when comfortable.
Be loud. Do what you need to to do the right thing.
Don’t be sick.