Let’s ignore how an AP and Wi-Fi actually work, overlook all the obvious issues and just focus on your example. You got 1019.6Mbit, do you understand that even if you had your AP plugged into a 100Mbit PoE switch, the app you seem to think is so amazing would give you the same sort of result? Yea... that’s kind of a problem as it’s not representative of actual throughput, just raw packets and only between a single client and a single device and only as long as it’s only on the AP. Unfortunately with real world overheads actual TCP packets, the accepted number from users is much, much lower. As you clearly don’t believe me, why not have a look at other Unifi AP AC Pro owners results on the Ubnt forums? I suppose because what they say contradicts what your app told you, they must be wrong and possibly obnoxious?
https://community.ubnt.com/t5/UniFi-Wireless/Realistic-throughput-of-UAP-AC-PRO/td-p/1730349
Perhaps consider that just because you don’t realise something you’ve said is funny, it doesn’t preclude others from pointing out it’s funny and why. Getting bent out of shape about it doesn’t help anyone and is more likely increases the chances of your ‘feels’ getting trampled over even more.