We had a Motability Europcar hire a couple of years ago, car delivered on time, tank just under full, but depot 25 miles away, so no drama. Used it for 3 days, filled it up, they collected when they said they would, never heard another word.
Painless.
But yes, car hire firms can be a nightmare. Europcar said No Dogs under any circumstances! Which is an issue when your wife has a guide dog…actually, its not an issue, its illegal. But still they insist.
In life, it's not who you know that's important, it's how your wife found out.