I don't get the struggles? I can swap out a filter in 15 minutes, including the time to jack it up and remove the Jubliee clamp
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As with the electrical connectors in the engine bay that have the rubber weather seals, they exert a force on the connector that needs to be unloaded before attempting to disconnect them, which is just a simple case of pushing the plug hard up against whatever it's connected to, and then pushing the tab in with your finger, and off it comes. The amount of times I see destroyed plugs from people levering them off with screwdrivers
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Same applies to the fuel filter. It's not residual fuel pressure preventing them from coming off, just push the bundy fitting hard towards the filter to unload the O ring tension, then press in the tab and off it comes. I've done it several times with just my finger nail, screwdrivers not required
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Removing the petrol cap doesn't do anything as the in-tank pump has a non-return valve to maintain pressure for hot starting.