I rise from the ashes.
HL2RP is a dead concept. I don't need to repeat what anyone else has already regurgitated a hundred times over. Willard Networks is the last bastion of consistency and even they are feeling the struggles of an aged era that many have long moved on from. If you want to roleplay being beaten and oppressed by the mighty alien Combine, join the server and indulge yourself in nostalgia. In a few weeks or months, that is, seeing how they're also taking an extended break to figure out direction, narrative and map issues.
There is nothing you will do that hasn't been done yet, anyone who says different is simply delusional. You want people to stick? Run seasonal events like people have said, or stop trying. Your 2016-2019 esque sphere of Nebulous is brain dead but you're trying to desperately keep it on life support because you can't let go. It's harsh, but the bitter truth. Let go, move on. It's 2024.