As far as I know, it's par for the course for immigration in most countries I ever heard of. On the other hand, anyone who heard of consistently nice immigration procedure for normal people (not Messi) should chime in.
From a incentive strucutre POV, they lose nothing from false positives (denying entry to someone who would have been fine) as candidates will probably try again anyway, and no one will come after them for their shitty procedures as by definition applicants aren't full voting citizens and stay in a weaker position possibly all their life (imagine filing a complaint and having your name on a black list the rest of your immigration life, even if that list probably doesn't exist. That fear alone is enough to let a lot of things slide)
From a incentive strucutre POV, they lose nothing from false positives (denying entry to someone who would have been fine) as candidates will probably try again anyway, and no one will come after them for their shitty procedures as by definition applicants aren't full voting citizens and stay in a weaker position possibly all their life (imagine filing a complaint and having your name on a black list the rest of your immigration life, even if that list probably doesn't exist. That fear alone is enough to let a lot of things slide)