You’re running DarkRP like all other unoriginal Gmod kiddies, you’re really not going to get more players with a couple of addons. You’re competing with literally hundreds of other servers. If you want to have players that have fun, you need to not host the gamemodes that are the easiest to setup: TTT, DarkRP, Sandbox and Deathrun.
Although it’s not so easy to get players with anything else, you’re more likely to get a community going if you’re not trying to advertise the same exact game along with thousands of the same kind. Running DarkRP is suicide if you want a lot of players that actually care about your server, at least if you don’t already have a community around it. Adding a few extra mods won’t attract a huge crowd.