spiritual struggle *need help badly*

this is just a little descritption of an awful predicament i seem to be in and would really appreciate it if you could all pitch in and give me a hand. it would be even better if someone who has been in the same shoes, to advise me as well i really and desperatley am in need of some help. i've been so hesitant to speak or seek help about this, but its getting ridicilous.

a few years ago (now nearly four) i had some trouble with my deen. i didn't disbelieve in it, alhamdulillah, but i was severally trialed with it. what happened was i was stupid enough to fall for the deception of shaytaan when he used to (and still does) come to me during prayer and tell me that my wudoo wasn't right, i was doing too many/too less sujoods, my ghusl wasn't right, and my recitation during prayer wasn't corrected. it used to take me so so long (abnormal lengths of time, really) to complete my prayers. in fact by the time i re-done my wudoo and my prayers over and over again, i'd finish one only for another to start. and even after that, i would still worry if my prayers were acceped! my whole life was on hold because of this-im not joking. the only thing i seemed to do was pray.

to cut a long story short, over the course of these four years, due to this wiswaas i was pretty much trialed in all aspects of my prayers to the extent that i had lost that really nice sweetness that comes with prayer. its really sad because i used to be so eager for prayer, i loved the tranquility i used to have during prayer. i used to revovle my life around my prayers, look so so keenly towards them i couldn't wait for the next one. i used to eat before praying so that my hunger wouldn't distract me. i loved it, i really did.
but things happened due my own ignorance and sillines and now all those nice feelings, have turned into hardship
im slowly and slowly realizing where i have gone wrong and trying my best to rectify it, however im carelss with prayer. i dont pray it on time, i dont have that fear that im being carelss in it. it doesnt tap away at my conscious like it used to. i mean i fulifll the obligations, but its a joke, really. it feels like such a task. i feel eager for the day to finish so that i know that my prayers are done for the day. what kind of insincere heart must i have

it really saddens me that people can take like 5 mins to pray a four raka'ah prayers, whereas it will take me like 15

other things are happening to me that i feel that it is due to my weak iman. other problems seem to be stemming from this one, such as my weak iman, my lack of motivation to study the deen (i can list the books and what my routine was when i used to be more into the deen, that i have completely left off for no good reason) there really isnt any barakarah in my time. it was strange because i used to get so much accomplished in one day, and used to fit it in whereas now, i get nothing done, and the time just fly's.
all these are tell tale signs that somethign is deeply wrong with my heart and iman. there's certain things about me that im beginning to realise that werent there before such as my tempations to show off in ibaadah. i was never like this. im beginning to lose that paitence i used to have where i would do things for the sake of allah such as forgive people, forgive your family lest ties will be cut even if i would be in the wrong...

so yeah, that was an overview and as you can all tell, im in dire need of help