There's a huge misconseption about what civilian roleplayers are. A lot of people seem to assume that a civilian roleplayer is just somebody who stands at the mall and does fuck all else, and if that's what you immediately think of when you think of civilian roleplay then I can confidently say that you have the completely wrong idea about it and should try to be more open about what civilian roleplay is.
The bartenders and security guards in that club you went to,
The taxi driver that picked you up,
The guy doing taxes for businesses,
That person you seen jogging along the beach,
These are the people that make the world feel busy and alive. Do you really assume that every person you drive past is either a cop or a thug? When you actually roleplay in the civilian scene, you realise how many players are actually playing LSRP to, you guest it, roleplay something realistic. I've met so many amazing roleplayers who simply log on to socialise, go to work (an ic job like bartending, doing graphics, news reporting), go for a meal, then go home. I promise you that there are more people than you think roleplaying like this, and it's what fills up the world with normal, civilian people.
When I was running Roze Enterprise we hired over 150 people across 2 years. Yes, one hundred and fifty people interested in civilian roleplay with one faction. We were one of the only civilian factions ever to provide full time jobs to anyone who was willing to put in the effort and trust me, a lot of people enjoyed roleplaying a full time job; bartending, doing security, trucking, whatever, with a team. The people that you see as mallrats are the same people that we turned away from the faction. You assume that they are civilian roleplayers, generally the people you are thinking of are just trollers.
For a non-illegal faction, the amount of interest that we seen for civilian roleplay was overwhelming - Another civilian faction that did very well was Roux, which created a lot of jobs for the playerbase and created a lot of very high quality civilian roleplay. With good support for civilian roleplay it would be more common to see amazing civilian factions creating jobs and helping the economy, as well as filling in the empty space between illegal roleplayers and cops.
If civilian roleplay was taken more seriously, you would see more IC businesses that are run realistically - Competing with other businesses, creating a job market etc, and not just a "front for my illegal faction". You would see in character news companies showing up to big events. You would see Los Santos University opening up and actually becoming stable. Civilian roleplay is the part that fills in all of the gaps to make the world feel alive, and not just a cops and robbers server.
The two major issues that have been affecting the civilian scene are the economy, and the fact that a lot of people majorly misinterpret what civilian roleplay even is in the first place.