Altho I do really like the game (8-/10), I do have to agree with you.
These minigames are a pain in the ass, not really fun, not really well made (read: unpolished) & the worst of all; present in EVERY level!
Everytime I enter a new world, I think:
'Ah, crap! I have to beat these Rextro & Kartos minigames again... Arhgggg!'
It is the biggest gripe I have with the game, tbh.
They should've handled minigames like they did in BT, where there are some recurring minigames, but nearly every level has a fitting well-designed & polished minigame JUST for that level.
I hope PTG learns from YL & handles this aspect differently in TL.