MW surVivor ... clutched. 343k on the 0D0
Sounds more like you have a faulty transmission that its not learning your driving habits, or its got a bad torque converter the dealer, or toyota is saying its normal.
My 2020 auto learned my habits, and road conditions I mostly operate the truck on within 1500 miles while using the D mode only, but I started out with a fresh truck having no miles on it by anyone else.
i can better understand now the hesitation to take yer gen3 wheeling and exploring west of the Mississippi river
once you cross it your rig will say WTF! where is tacoJoel going? and get all wonky erratic shifting on you