Of course it isn't true. One of the most "eminent" darwinians, Haldane, Darwin Medalist and co-founder of the Modern Synthesis, was a shill for Lysenko. It's kind of hard to reconcile the fact that the architect of the modern theory of evolution was a useful idiot for Stalin, with the notion that the Soviets were anti-Darwinian. In fact Haldane mentions (Science Advances) that Vavilov (the guy who ended up in the Gulag) was alledged to have had anti-Darwinian views.
Thanks for backgrounder.