Funny, I heard the total opposite about Nissan Leafs. The industry was guesstimating that batteries would last 8-10 years. The first Nissan Leafs (which was about the first commercially mass-available EV) had battery lives where something like 90% were still going strong and still 80% of original capacity left after 13 years.
Rather than the Leaf being problematic, it was the car that showed the market that worrying about the lifespan of EV batteries wasn't really necessary.
For a good counter-example, look at the early Nissan Leafs. They burned out their batteries in a matter of a few years, but battery replacements for other brands from that time are basically unheard of. (The inherent information asymmetry for new car purchasers is one reason Biden's IRA dictated minimum car battery warranties.)