Nothing of the sort has been shown. Him being Super Saiyan 3 Gotenks' level and no one commenting on is the same as saying Piccolo is Super Saiyan God Goku's level based on him not dying to Frost.
They did comment on it. Beerus said he was pretty good and Goku said he was amazed at how far he'd come on his own. Piccolo didn't get any comment whatsoever.
Second, the only reason you think Trunks is god level is because you are incapable of judging actions contextually.
How come everyone else seems to be able to post comments without being snarky but you aren't able to?
For example, your weak reasoning also implies Bulma beating up Goku at the end of BoG is proof that Bulma is god level. Even though it was a context in which Goku was relaxing and not going all out.
Except you don't know in anyway at all that Goku was relaxing and not going all out. As nobody at all said that Goku was holding back when he was fighting Trunks, either in the anime or manga, then you don't actually know, you can only assume. What we do actually know however is that Trunks was holding back. Likewise we know Beerus was holding back because we know for a fact he can knock out people stronger than Bulma in one hit.
Similarly, you take SSB Vegeta taking his time beating Trunks as proof of Trunks being strong. This is ridiculous because we know SS3 Goku is weaker than SSB no matter what view you hold, and he beat Trunks in 1 hit. Your pure visual reasoning also implies that SS3 Goku is stronger than SSB Vegeta. This is absurd.
No it's not just that, it's also him being able to react to Super Saiyan Blue's speed and dodge his attack and it's not as though Vegeta let him hit him either. Again we know for a fact that SSJB is stronger than SSJ3. We also know that after Trunks fought SSJB Vegeta he was confident that they'd beat Black which he wasn't after he fought SSJ3 Goku. So Vegeta at that time would be putting out more power than what Goku did.
He can be holding back and that's fine but he would not laugh off SSJ3 and then go at Trunks at a level underneath SSJ3.
Third, SS2 Trunks is simply not god level in the anime since Golden Frieza and Hit can sense godly ki and so can Base Vegeta, all because of power as Whis said (they were not doing any training to sense god ki.
But Final Form Frieza can not sense Godly Ki meaning that it doesn't mean anything when Frieza was around the same level as the Base Saiyans when they fought and they were stronger after training with Whis.
Although it seems like almost everyone in this thread accepts the two base theory now.
No you can't keep forcing your opinions on to others and then trying to play that off as some kind of weird victory. With the newest chapter it only became even more obvious there is no two bases.
In the manga Goku didn't absorb the power of God and it goes Base -> SSJ -> SSJ2 -> SSJ3 -> SSJG -> SSJB. In the anime he did absorb the power of God and it goes Base -> SSJ -> SSJ2 -> SSJ3 -> SSJB.
Wtf, SSB Vegeta can't do any damage to Base Black?
Wow it's almost like SSJB isn't leagues above SSJ3 level like Mikado and myself mentioned. That surely can't make sense because Black is only as strong as SSJ3 Goku whose only Buu level right?
No this fits just fine, further confirmation that their Super Saiyans forms are God level like they said.