Geets was the only one thinking sensibly. Using the Spirit Bomb was a stupid idea, it was an all or nothing attack at what was basically the start of a fight. They could have even tried fusing before that!
And then it backfired, Goku made no real headway with Jiren even after getting a power up and now he's going to nap for a couple of episodes.
Thinking sensibly in what way? What you said makes zero sense, Jiren is stronger than Goku, Jiren is likely stronger than everyone. Hell Freeza gave energy and we know that dude is always scheming and plotting. Vegeta was being a fuck, and it was awful there is no other way to look at it.