In all honesty this is one of the best tames to have. It's good in health and damage, the major flaw would be stamina and speed. They also fail to mention this thing gets hide, meat, prime , etc, better than what it is listed for. Killed a paracer and got 30 pieces of prime meat. You can even take on alphas.
To get wood, use normal attack which is slashing with claws. To get berries, use bite attack. To use bite attack on mobile, change multi tap to alt attack 2 and tap with 2 fingers when riding the Therizinosaur. To get fiber, use the tickle with claws move. To use the tickle with claws move on mobile, jump when riding the Therizinosaur.