I'm stuck! Crank arm rubbing on the frame

Hi there,

I'm stuck here :(
Trying to install a Sram Force AXS crankset (WIDE version) on my bike, with a 73mm crankcase.
The manufacturer recommends to install a 3mm external spacer on the right side. However, when I Do that, the right crank-arm slightly rubs on the sidestay.
I added a 1mm internal spacer on the right to move to arm farther but now its rubbing on the left.
So I added a 1mm internal spacer on the left again, which was obviously a bad Idea...

Any ideas ? I have 2 inner spacers and two outer ones (3mm and 4.5mm).
Edit: important detail I guess. The frame is an older Titus custom made MTB, originally made for 2x or 3x cranks. Previously build with a Deore crankset, which worked fine

Cheers

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Dumb thought but is the crank axle wide enough?
My experience is limited to square taper cartridge or loose bearing arrangements and usually the cure is a slightly wider bb
But I’m not sure this kind of approach is an approach for external cup type magic?
Failing all that, crimp the stay
Actually, don’t do that

It's supposed to be wide enough for a 73mm BB. However while typing my message I realized how dumb I am trying to build a 2000 MTB with a Road electronic groupset aha.
I thought of crimping the stay but i'm pretty sure i'll resell the frame at some point and not sure about crimping Titatium.
You're intuition seems right. I guess I would need a MTB specific crankset with a higher Q-factor

PS: I love your nickname :D

Titatium

I rather like the idea of a bike made from tatty tubes ;)
It’s a description that works for all the bikes I own as well, so might have to get some stickers made up

Hahaha, perfectly sums up my bike collection as well in fact :D

As far as my issue, after playing around with spacers and visiting some real mechanics, I actually need to either change cranks or crimp the stay.
I'd rather crimp since the compatible cranks cost around 300pounds...