Why can't Xin Zhao effectively play top lane anymore?

So, I've recently come back to playing League after a 3 year... almost 4 year break. Needless to say the game has changed a lot since then. Back then I used to play Nasus, Renekton, Garen, Rumble, Warwick, and Xin Zhao top lane all the time. After coming back most top lane champs that were decent picks back then are still decent picks now, all except for Xin Zhao (and maybe WW but I haven't tried him out top lane yet), whose existence has largely been relegated to the jungle. Everyone I ask keeps telling me he isn't a good choice for top lane anymore, even though before his existence was easily split between the 2. most guides for Xin are assuming the position of jungler. And after being back for about a month and a half now I agree with them. I've tried my best in top lane with Xin Zhao and I get stomped on in one way or another, even if I manage to secure a couple kills, I'll fall behind on CS because of constant harassment from the enemy jung, so much so that nearly every game I've played top with him I wont complete my first item, usually trinity force, until around 20 minutes in. Xin Zhao has always fallen off late game, which makes the slow start even worse, as my team is already flaming me about being behind and having been killed a few times by a combo effort from the enemy top and jungle, which by around the 9-10 minutes mark can usually harass me until I'm under turret and then proceed to kill me under it. I'd like to be able to play Xin Zhao in top lane again as well as for him to be a viable top lane champ, as he was one of my favorite champs to take up there and not have people ask me why I'm not going jungle with him.