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In Russia and Ukraine, there simply aren't any decent bookmakers. And there haven't been any since Marathon was forced out of the post-Soviet market; it was several leagues ahead of the surrounding mediocrity.
Since then, a Russian/Ukrainian bookmaker equals either the nonsensical ramblings of simpletons with absurd odds and almost instantaneous maximum bet limits for any sensible player (Fonbet, Betsity, etc.) or outright scams (like 1xBet).
You don't even need to experience this firsthand to understand it. Just read the existing reviews.
In general, in the world of bookmakers, there are enough that play both "fairly and strongly" and "weakly, but still fairly."