Exeggutor

Exeggutor's combination of high Special Attack, Leaf Storm, and Psychic typing make it much harder to safely switch into, unlike other Grass-types like Whimsicott and Eldegoss. However, Exeggutor's bulk, defensive typing, and Speed leave much to be desired, so it's easily offensively checked by Pokemon such as Charizard and U-turn Silvally-Steel. Furthermore, Exeggutor's lacking coverage leaves it easily walled by Pokemon such as Ferroseed and Galarian Articuno. Overall, this can leave Exeggutor difficult to justify over other superior Grass-types and Choice Specs users such as Whimsicott, Mesprit, and Jellicent.