In fairness nobody said they deemed him not good enough. The OP said the fans rate him. Meaning Dundee united probably do aswell. Good chance they've wanted to keep him and he's left. Also probably not one person here slagging the OP who's ever seen the guy play. No as if teams have never signed somebody from a lower league before who's ended up doing well.
For the record I've never seen him and don't know anything about him but some of the patter back to the op is cringey and like a bunch of wee weans egging eachother on to make the next "belter of a joke"
OP I think we're signing Jefte anyway so I don't think we'll be needing another left back.