The Russians failed to strike RADAR, air-defenses, airplanes / fighters, drones, helicopters, or any other powerful (and expensive) targets. They were unable to strike M777 or HIMARS, or ammunition depos.
This means that the Russians do not have the intelligence, or capability, to strike at military targets. Or they're too stupid to understand proper SEAD operations or why the ammo-dumps are useful to blow up.
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Ukraine only has 120-ish M777 guns. Why didn't Russia just blow up all the M777 guns? Its not a big number. Or what about the 12 HIMARS launchers they're using? Its an incredibly small number of HIMARS.
Answer: Russia is incapable of doing so. They either don't have the intelligence to find them, or they are too well defended that Russia didn't think such strikes would be successful.