The Russians have tons of things that work well. Why fix something that isn't broken?
The VSS Vintorez is pretty much an ingenious suppressed assault rifle derived from the AS Val (which appeared in the 1980s). It is designed around a new 9x39 cartridge, which is heavy enough to still do significant damage when moving at subsonic speeds (as opposed to 5.45 and 5.56 which are too light). The Western equivalent has been the introduction of .300 Blackout.
The SVD was invented in the 1960s, so it is an older design (but about the same as the M14 and Remington 700). The SVD was designed as a general-issue designated marksman rifle. DMRs are designed to be widely deployed among a rifle platoon to extend the reach and range of the platoon. In this role the SVD works well as it is lightweight and capable of accurate but sustained fire (the role of the newer MK14 EBR, except the Russians figured it out decades earlier).
The OSV-96 is an anti-material rifle... not much more you can do about those until we invent light-weight materials or lasers. Incidentally, the OSV-96 was designed in 1996... making it over a decade younger than the M82.
Furthermore all the US weapons you listed are not entirely "new"... most of them are at least 30 years old, or are just modified versions of older firearms.
The M82 was made in... you guessed it, 1982.
The MK14 is pretty much an M14 with some fancy clothes, and the M14 has been around since the Vietnam War.
The XM2010 and M24 are all reworked versions of the Remington 700, which was invented in 1962.
The M110 is pretty much an SR-25, which in turn is pretty much an AR-10. The AR-10 was invented in 1956.
The real story is that most militaries anywhere in the world are always strapped for cash (at least as far as infantry weapons and gear is concerned), and are absolute dinosaurs in terms of actually embracing new technologies. Out of all the weapons you listed, the VSS Vintorez is the only firearm that brings something new and original in its design.