Yes, I agree it sounds wrong *IF* the farrier is trying to contract feet, but with respect, you're relating 3rd hand info, which may have been misunderstood, so I wouldn't jump to judge the farrier based just on that. As for your horse being sore for months after this farrier's visit, yes, it could definitely be due to bad trimming(possibly in conjunction with other issues if it went on so long), be that a general bad practice of his or an 'accidental' kind of one, but there are other reasons the horse could have been sore & considering your info, I wouldn't rush to automatically blame the farrier. Some possible reasons why...
It could have been pure coincidence that your horse became lame after the trim. If your horse was suffering from very mild(subclinical or 'low grade') laminitis, he could be more sensitive post trim, regardless of how good a trim may have been done. If your horse was left without regular enough trimming - it depends but 8-9 weeks IME is generally at least a few weeks overdue - horses can become sensitive post-trim due to being allowed to overgrow before being 'corrected', rather than just kept maintained. This seems especially true of 'low grade' laminitis cases, who if trimmed regularly enough for maintenance are fine, but are sore post trim if feet are neglected for any length of time.
Your pics show that your horse is rather shallow soled, with stretched & possibly separated(can't tell cos mud) walls all round. Given that hoof form, it appears possible she was suffering 'LGL', which may have been part of the cause. It seems that the frogs, while not looking terrible, are a bit thrushy & fronts at least a bit contracted, indicating that they aren't being used well/enough &/or the environment may be causing problems.
It appears possible(hard to tell from those angles) that the hooves may not be well balanced. Only 2 weeks out from a trim, I'd be inclined to suspect the trimmer if that is the case, but it does depend on what the horse has been doing, how she moves etc, as well as how she is conformed - that could possibly also be the right balance for her. Looks like the horse is also about due for a trim there, at least to roll the outer walls. With regard to bars being trimmed short but already long again in these pics, for a start I wouldn't say they're overlong there, but if they were previously & had been left for 8 weeks, it's possible that his relieving them allowed them to kind of 'let down' quickly after that.