@GreatGuy Not a problem. I've had a pretty good day today. At work I saw two big guys pushing a shopping trolley full of rainbow colored stuffed animals. I thought it was pretty funny. So did they.

thanks@Mickk

@GreatGuy
I tried my idea, it didn't work. It seems that the wing will pass right through the structural 'brace' defeating the purpose of the brace.

I have 'fixed' your aircraft, but then I remembered finding a 'structural wing with control surface' that was uploaded quite some time ago.
Here is the link --> https://www.simpleplanes.com/a/g3uDIy/structural-wing-with-control-surface-modded
That should solve all of your large wing problems.
Download that, save it as an 'assembly' (to do that make sure the cockpit is not near it and drag it to the top left corner) and any time you need to put big wings on something, use that.
I'll upload your fixed aircraft if you want, but all I have really done is put new wings on it, installed landing gear and moved the engines a bit.
Basically nothing pretty much.

i really need help lol can you do it for me please and i can ‘examine’ what you did because this is literally my first time making a big plane like this and im confused at what you wrote @Mickk

To kill wing flex, get the 'Overload' mod, use structural wings, then use Overload to add control surfaces to them.
To do that, select the wing, then go to the 'wing' tab in Overload, scroll down a bit until you see 'allowControlSurfaces' and where it says 'false' change that to 'true' and you will be able to add a control surface to that wing.

EDIT: Just saw you are on iOS, which is why you are asking for help.
Maybe putting a structural wing under the main wing will help with wing flex, not a full wing, just a thin one.
It seems making big wings that don't flex has always been a problem in game, I pretty much always use structural wings these days.