There arent any real sideboard solutions to fix this matchup outside of using Negate or hand disruption to prevent its very existence
Saw in Half This was one of the earliest cards that we saw from UNF, and it really set the stage for the rest of the set
And we see this in some of the most popular Mono Red commander options on EDHREC: Red is very good at Burn, and three of the top Burn commanders come with built-in resiliency to removal -- Ojer Axonil, Deepest Might, Solphim, Mayhem Dominus, Purphoros, God of the Forge -- which is especially good since Red has basically no good answers to board wipes
Similarly, the equipment sticks around on the battlefield if the creature it's attached to dies
With its ability to refill your hand out of nowhere, it's no wonder this 1 mana spell ended up restricted