the teflon tubes - if you've mainly been running pla - don't really wear out.
The one in my delta was there for about 2 years and 6 km of filament. Only reason i changed it was that I'd snapped anozzle off in the heatblock and had to replace the whole lot :-)

Unless you are regularly running filament that prints at 240c and higher - the ptfe tube should not wear out.

You can get dodgy rolls of filament.

earlier thjis year I was using a silver/grey from ebay that cost £10 a roll - delivered !
Just about the best filament I've ever used.
The third roll just blocks the nozzle, no idea how but the only way round it is to replace the nozzle.

I even tried unravelling about a 1/4 of the roll - in case it was just a bad patch at the start - nope - 2 more nozzles later I just gave up and threw it away.
And let me tell you getting 0.5mm nozzles, by themselves is not easy.
In the end I bought a packet of 20 assorted that came with 2 0,5's - as that was cheaper than buying a single 0.5 by itself.
What i actuially wanted was a pack of just 0.5's - but nobody seems to do that.

And the sad thing is - I'm just not going to bother with that filament again. But man it was good.
My current favourite budget pla is BQ brand.
Excellent stuff.

So it could just be that one roll.
Try something else. Or another roll of the same stuff