The Republicans can and will filibuster anything they don't like. But saying this is some sort of impossible obstacle is complete bullshit.
The filibuster itself can be nuked with a simple 51 vote majority (it has been altered in the past, and Republicans have no way to filibuster changes to the filibuster). So Republicans only "control" the senate as long as Democrats allow them to do so. If all 48 Democrats, 2 Independents and the Vice President want to end the filibuster, they can do so.
The problem is that two Democrats in the senate are refusing to even consider it. Joe Manchin (West Virginia) and Kyrsten Sinema (Arizona). They've also been threatening to derail the budget reconciliation process for Covid relief, which takes longer but only requires 51 votes and is filibuster proof. There's heavy public pressure against them, but it remains to be seen whether it will have any effect. If it doesn't, you can absolutely blame these two idiots for aiding and abetting Republican obstruction.