Learn English – What do you call the person who gives a ride

There are several possible answers;

If this behavior is intentional - they may be a "saboteur" (one who sabotages), they may be "deceitful" (deceiving or misleading others), "suborning" (inducing (someone) to commit an unlawful act) or "malicious" (intending or intended to do harm).

If it is unintentional - then they are "mistaken" (wrong in one's opinion or judgment), "incorrect" (not in accordance with fact; wrong) or possibly "out-of-date" (no longer useful or acceptable) or even "out of touch" (not keeping informed of the developments relating to someone or something).

One of my pet hates, but no-one said that neologisms are unacceptable even if I'd scrub out my mouth with wire wool rather than use this one in real speech:

Ideator

A person who creates productive ideas, a conceptualist

One who ideates; one who holds or generates an idea, or synthesizes a concept

https://www.urbandictionary.com/define.php?term=Ideator

https://en.wiktionary.org/wiki/ideator

"Ideation". I ask you. Mutter, mutter, grumble.