#20 stupidly thought they had enough information to complete their research. Funny enough, he assumed Goku's age would mean there wasn't an opportunity for any more drastic power-ups. Master genius stuff right there.
Nah, I totally get why it comes off like that, Super. I just think the "miserable condition" is what's affecting him from using all of his power. I see it as Goku fighting with all the power he has available and can't use anymore than that.
The way I see it, there's a difference between suppression and not going all-out. Suppression is them making it a point to decrease or increase their power when they choose to.Choosing to not fighting all-out seems to be an effort thing. Goku said Trunks didn't come at him with his all, but I don't think he's actually suppressed there. Raditz said he was going to increase the power in his attacks during his fight with Goku/Piccolo...and we know that nigga can't suppress shit.
Truthfully speaking, a lot of the stuff around this part of the story can come off as unclear.