If this dino spawns near your base and you are low and mobile player then just do one thing. Put your all stuff in your base and go near the dino then run in opposite side of your base and lead him to far away from your home before he destroy all you have even your pets. just don't uninstall the game bcoz of this😂
To tame: build a small trap out of stone pillars or metal pillars. Size it to fit a Therizino. Once it is in, block in its only exit and knock it out. I found that using berries was way less stressful than narcotics at mid level, because the Therizino would slowly gain torpor for a long amount of time instead of all at once for a few seconds. Using a Parasaur to collect the berries was very efficient. I had 400 extra narco berries. In the future I will use the same process for a higher level one.
I am a mobile player I play on the official server (Alpha) and my username is Doglife so if you see me say hi. I tamed one of these easily. My friend held me in the air with his pteranodon while I unloaded tranqs on the Theri. I didn’t miss a shot and soon enough the Theri went night night. We gave him a soothing balm and a bunch of mejoberrys and BOOM we have our self a Theri named Snuffy. You can tame almost any creature this way. Please like so people can see. :)