while technically correct, what the person said is not incorrect. I forget what the term was but the phrases can be placed at different locations throughout a sentence without changing its meaning.
This is why for non-native english speakers, english is among the most difficult languages to learn. It is also why for english speakers, other languages are so difficult to learn.
Their structure is correct with Subject (I) Verb (feel) and I forget the term for the other pieces in the sentence aside from the adjectives and adverbs
you could also write the sentence like this: "I feel like the balance team is bad at basic math, but I also feel that the balance team is bad at balancing the game"
or "I feel like the balance team is bad at basic math and at balancing the game"
or "Not only is the balance team bad at balancing their game, I also feel like they are bad at basic math"
when it comes to conversation, most people prefer regional dialects and slang or even just emotional responses
"The balance team is extremely bad at balancing their game. It feels like they can't even do basic math!"
English among a couple of other languages is unique in that it is what is called an "Evolving Language"(I think, it's been a while) or a language capable of changing to suit the needs of the people and even capable of borrowing from other languages
Whereas some languages do not allow for restructuring sentences or concepts