Let's go by parts.
BaddyG it's a great player and and I wouldn't call you crazy if you told be he is slightly better than Boo but if TH has decided to go for Boo is because they've seen something and tbh he is owning rn and helped molsi carry his team really far. Also baddyg has been coIGL for like a split, that's not very reliable IGL. Overall you would agree with me if it is an upgrade it's just slightly?
Vokashu did have many offers but his buyout was huge and again, you will agree with me it's a risky take you don't know how he will perform, meanwhile AvovA has experience and chemistry with the players. Also vokashu it's known for having some toxic polemics
About MiniBoo he has a similar peak than keloqz but I totally agree he is way more consistent and I like him a lot plus the brother buff could have been real but tbh keloqz has the talent to be top in the world
So in conclusion all of them could or could not be upgrades, but I don't get why all that hate. Are they really much worse than KC or vitality for example?