The Rams sold out games for 40 years, including the 100,000 seat Coliseum.
The Rams played in a horrific baseball only stadium that had an ugly slab of concrete erected to enclose the stadium. It was an awful venue to watch a football game. Despite that, the Rams sold out Anaheim for 15 years before Georgia the ***** ran the franchise into the ground in order to move it back to her hometown (St. Louis) as the City of St. Louis dumped tens of millions of public dollars into her purse as a "bribe".
It's a myth that LA doesn't and won't support the NFL. The Rams led the NFL in attendance for decades.