Paddle problem or fin problem? Advice please

Hey everyone,
Came across some posts here today and once again have been further educated by this forum!! Just hoping to get some clarity on this: so I read a post that mention the effect wrong fins can have on paddling speed.,.I have never heard this and never tought of it before and I'm kind of hoping now that it maybe partially responsible for some of the difficulties ive been having of late..so Ive been doing alright lately, I find I may get one good session in four, on a good day I will be going down the line pretty much every attempt...on a not so good day I will struggle to catch one wave, get fustrated paddling and paddling watching wave after wave go beneath me so gradually moving closer an closer to the peak until it gets too steep and I get battered!.. I know myself my paddling needs to improve too and I'm working on this but just wondering if my fins could be contributing to my troubles? I'm 6'ft 75kg and I use a 7'10 hybrid, the fins on it are the ones that came with it so I think there fairly cheap bulky ones, can anyone advise what sort or size of fins I should be using with this? I dont find stability a problem really at the moment just bad days paddling so just hoping someone could shed some light on this or if fins would have a noticable effect on paddling speed? Thanks a million for any advice, really appreciate all!!
BB
Came across some posts here today and once again have been further educated by this forum!! Just hoping to get some clarity on this: so I read a post that mention the effect wrong fins can have on paddling speed.,.I have never heard this and never tought of it before and I'm kind of hoping now that it maybe partially responsible for some of the difficulties ive been having of late..so Ive been doing alright lately, I find I may get one good session in four, on a good day I will be going down the line pretty much every attempt...on a not so good day I will struggle to catch one wave, get fustrated paddling and paddling watching wave after wave go beneath me so gradually moving closer an closer to the peak until it gets too steep and I get battered!.. I know myself my paddling needs to improve too and I'm working on this but just wondering if my fins could be contributing to my troubles? I'm 6'ft 75kg and I use a 7'10 hybrid, the fins on it are the ones that came with it so I think there fairly cheap bulky ones, can anyone advise what sort or size of fins I should be using with this? I dont find stability a problem really at the moment just bad days paddling so just hoping someone could shed some light on this or if fins would have a noticable effect on paddling speed? Thanks a million for any advice, really appreciate all!!
BB