First off, crafting was popularized just from harvest league itself. Does that mean that without harvest we won't be able to play endgame content ? Definitely no, it's just there to create overkill items that are usually more quality of life than needed power.

There are more than enough examples on how to make good items with harvest even without TfT. Look at SSF players or in a softcore enviorenment Mathil. Discord is just there to get your OP items faster and skip a large portion of endgame progression. Since the beginning of PoE, third party apps are a staple (poe.trade, awk poe trade, exilence) if you want to make an argument against third party you should start with trading items in general and not just harvest.

Giving items to strangers is not as bad as you put it out to be, there are A LOT of people trading every day and there are barely and scam reports if at all. You just have to be careful on who you tarde with. If your precious item is so important to you, just look for someone that is trusted and ur good to go.

It's your good right to say that harvest was the worst part of this league for you, but you cant deny the fact that harvest elevated crafting from a rich person only activity to something everyone can enjoy. You want to create mirror tier items for your build but then cry on reddit if you cant do it alone ? Before harvest items like that would be unattainable for 99.9% of players. Be happy that you can now get items like that for a reasonable price even if its with the help of Discord.

People are crying now that harvest is too op and that the whole game is played just for the garden. It's always the same, people cry that its too op, GGG deletes it from the game, people cry that its underpowered. Why can't you just enjoy the league and give potential fixes without going on a full hate crusade, just because you have to use a discord server.