Don't let 1k mmr players tell you how to play. They know as much about the game as you do, they are blind to plenty of things. Even if wards are perfect, they do not have the map awareness to take advantage. Hard support is not farming nothing and only buying wards for 50 minutes. You still have to know when to last hit, and succeed at it as support. If you're in a lane that has 2 free waves, if you miss all 8 last hits that's a lot of gold. A 6k hard support is going to go 8 for 8 or 7 for 8. Its not your job to have 300 cs, but if you have 50 vs 10 that's a big deal.
Hard support is not really a 1kmmr position. I guarantee even if you have 4 farming idiots on your team some lane or jungle camp is going to waste in the course of the game. That's a symptom of the bracket, vs a feature of the game. The reason the 5 position exists in higher level dota is because the 6 cores on the map plus the other support are consuming the vast majority of the maps resources. You don't last hit as a hard 5 often at 6k because there is nothing for you to last hit. Your time is spent moving around the map, helping lanes, warding/dewarding. But those things function because as was mentioned the cores slowly become good enough that they don't let resources go to waste.
If you find yourself playing a weak support in a game, you need to hide in trees behind one of your cores, or hang out near a tower so that you can participate in a gank attempt on your core, but not be the opening target. You will always get picked off by shadowblade slark etc if you're visible and in front or alone. People do attack the first thing they see at 1k.
I have coached many people since 2011, it boils down to this. Dota is so hard, that even if you know something that doesn't mean you can do it. It takes a lot of focused repetion to build all the subskills mechanically and that doesn't include all the details about how any given hero needs to fight or play in any given game. Example: Storm spirit is easy to play relatively speaking against zero stuns and silences. However, he's quite a bit harder to play if you get counter picked and people use their picks to prioritize shutting down this hero. When someone gains enough experience to be pro tier basically, they know how to make the best out of bad situations. Anyone can shitstomp from ahead. Its how you recover when you get behind that separates players a great deal. This is true even at 1k 2k 3k 4k, but its more pronounced and easier to understand when you see things like Sumail getting killed 4 times in 5 minutes only to recover and dominate the rest of the game.
Also, its difficult to be coached for many people. You must be intellectually honest about the aspects of the game you control. You must be able to look back on a game and be critical of your play in a constructive way. Personal benchmarks are necessary and useful to judge your own progress as you will never escape roughly 50% winrate unless you're a smurf account who is already a 4.5k+ player or super outlier such as pros who breach 6k+. Improving at dota for a very long time, and I mean even into 5k region+ is still about increasing your personal performance. That's not easy to do in games where people rage at you, or feed, or just generally bad experiences when you lose. Given that 50% of your games are losses however, if you're not learning in them they are wasted time.
If you want, I can coach you for a game(s). I can literally be in your ear for 40 minutes about what you should be doing/looking in real time. As a warning this will overwhelm you massively. I am only 4.5k, which is pretty good at dota, but clearly far from the pros. At 1k MMR there are multiple routes to improvement you can persue. These include game knowledge (do you know what the items/enemies actually do to you sufficiently that you approach fights in ways that give you maximum win potential. Example: When Necrophos is in a game. He's a hero that must be burst dead by your team, Unless he has no farm, a necro that sits around in a fight will most likely win it eventually. Bristleback: Do you understand the stacking nature of quills, warpath, and bristleback so that your team doesn't kill itself by procing stack after stack while doing reduced damage hitting him from behind?
You can also pursue mechanical ability and awareness of the field of play. You can pursue coaching up your team as its moral officer with the focus of trying to herd your allies to 5 man when you know the team has a strategic lead and can win 5v5's with fullmana/ultimates. This also includes getting people to retreat, heal, get ultis back after a big win. Often players in your bracket will win a fight, keep pushing and ultimately feed their lives back 2v5 after the enemy has all respawned. These are some simple things that if you keep your team from doing/don't do yourself actually will win you a game now and then. That now and then game slowly increases your MMR as you begin to win games you would have lost in the past from even just a simple bad decision late.
This was a giant wall sorry about that.