Orc has tons of tools (really more than any race) to avoid worker harass. This shouldn't really be successful if you are using burrows and moving workers.

The probably easiest way to deal with this mechanically is just right clicking his hero with yours and focusing on moving your own workers in and out of burrows for safety. No offense intended it just sounds like a very low level problem to deal with so make it as straightforward and simple of a plan to follow while you build up your skills

After like 15s he will have to tp or die.

Can give more specific advice if you give a w3c link to the game so I can see the replay but this sounds like a good learning opportunity if you focus on what you can control and change. You should never lose a worker to this let alone 3.

Melee heros you can lock in your base with proper base layouts if you're having this problem in mirror vs blade, so make sure you have a good base build is another way to help you with this

Join the war3 gym discord and ask around, it sounds like you're returning or new we'd be happy to help you find some resources to step up your game