Uneven tyre wear on front left

I've constantly been having this problem since I got this car four years ago: The outside of the front left tyre wears down significantly before everything else. I've got the tracking (alignment) done when changing the tyres the last two times, and March 2018 was when I last changed the front tyres. I've done about 11,000 miles since then, and the centre is down to around 4-5 mm.

Should I be checking the tracking more often, or should I just go to a different tyre shop? Or is there something else wrong? Also not impressed with all the cracking on these tyres after less than 1.5 years (Goodyear EfficientGrip Performance).

 

I only replaced two of the tyres last year because of the uneven wear (they were rotated, so two were worn). I didn't rotate any since then, and the rears need to be replaced soon anyway.

Turns out the tie rod end is seized, so could not be adjusted. I'm taking it to a mechanic on Friday.

 

So I got the tie road end freed up, took it back to the tyre shop and the tracking was completed successfully (and this place gave me a proper print-out). Toe on the front left tyre was in too much by quite a bit (was +0°23' and should have been +0°06'). Hopefully that was my problem!