Everyones experience is different, everyone is looking for something particular in their rifle that suits their personal needs. Only a fool would tell you that "a TRG sucks". While it might not work for their particular needs, it certainly doesn't suck. And when anyone tells you the TRG triggers "suck and are mushy", I would recommend you take everything they say from there on with a healthy grain of salt. At least until they work through their anger issues...
This is my personal opinion, yours may vary; TRG's are excellent rifles, far batter then any other factory rifle out there with possibly the exception of AI's but that is subjective. TRG triggers are right up there with the best and probably are the best of any factory rifle. TRG22/42 stocks are very comfortable (in my personal experience) and the rifles are insanely accurate for a factory rifle, right up there with most custom build rifles. TRG bipod is the best of any bipod I ever had the pleasure of using. This is my personal experience from owning both TRG's and AI's as well as a variety of other triggers in other rifles.
Unfortunately nothing is only good. TRG magazines are severely overpriced and can be finicky feeding the first round (or 2) and the design of the stock on the older TRG22/42 , which by the way is no longer available in the US, could be perceived as outdated, hence their newer chassis model that is now available. In short I believe TRG, new or old are indeed not a "amazing value" and should be considerably cheaper then what they currently go for. But the fact they aren't, specifically referencing the used market, tells its own story. Having said all that, they wont disappoint either. And if you find a slightly used one for a decent deal, you surely wont regret it.
With regards to 300WM. Consider this; 6.5 Creedmoor Match ammo is 1/3 of the price, 1/2 the recoil and 3 times the barrel life while comfortably getting you out to the longest distance you can find on the East coast. Its readily available from a multitude of manufacturers in a large variety allowing you to easily find the one you and your rifle like. Same is more or less true for 308. Unless you NEED 300WM, I suggest you go with 6.5 Creedmoor or 308 and shoot a lot.
Hope this helps