I find it slightly amusing that people are complaining about shards of all things.... I farm shards and crystals daily while looking for my maps on nodes and I tend to get around 100-500 or so shards and around the same for Crystals and I stop after I get my map. I don't sell shards/crystals/clusters and have never bought except maybe once. I don't spam crafting 24/7 like some people nor do I spend my entire day online gathering, I do a bit of all of it every day and wind up doing 6-12 maps every couple of days with some people in my coil group as well. Granted every once in awhile I do have to go out and farm some crystals or clusters since they are even more limited on where you can get them (shards are on nearly every single Miner/Botanist node, vs only lv30s and 50s for Crystals and they're only on 2 of the sets of 4 and Clusters are only on 3 lv50 unspoiled nodes.)
Yea sure, I'm Legacy and came from 1.0 and did a ton of leveling/killing stuff and actually bought shards and some crystals in 1.0 and took advantage of the Alchemist recipes, but I've not seen as many people complain about not having enough shards for synths they need to do. And before anyone asks, yea, I craft 95% of the stuff I need because the current market boards annoy me to no end. If anything I'd love to see the old breaking down of Clusters and Crystals come back into the game but I gave up on that idea after I heard the devs completely shoot down the idea and refuse to ever do it again.
Though speaking of the Alchemist recipes, there were multiple versions of it, the simple ones were 1 Crystal + 1 Fine Sand = 12/16/24/32 Shards depending on NQ-HQ1/2/3. But the good ones used the Elemental Moraine/Radiant Moraine + Crystal/Cluster to get upwards of 64 Shards/Crystals, and they were roughly lv 15 and 37 synths if memory serves correctly. This may have been a bit much, but I would gladly welcome those synths back into the game if the devs ever change their minds on it. Why they were done away with doesn't really matter to me, all I hear most of the time is "blah blah blah RMT."
Basically at the end of the day, don't spam concentrate on one single thing and you won't have this problem where you absolutely need to buy shards, this game was balanced and designed well enough that you can get your own materials to craft what you need for yourself without relying on the Market Boards, just do the dailies they gave you when you can... people in my coil group do them every day they're able to log in and I never hear them complain about it and half of my group works retail. The only thing they complain about is not being able to down t6 and that the mechanics "aren't very fun" (their words, not mine).