Struggling to back on a old rank

(First of ALL, Personally I'd choose some flair like help or tips, but once don't exist one like that, I choose this.)

Hello every1!

being short, I play ow1 but never in competitive part (barely makes 1K comp points.)

back ONLY in feb25 (vídeo crashed, my controller also broke, a lot Of things.)

Gold in that time, Saw a lot Of vídeos Of pros (ml7, cloudy, a Brazilian ex-pro named nitrao , a lot Of own replays) Watch that cringe video:"How be a better tank" and stuffs. like that.

made It UP to m4. On Late Dec (20+) I was bored of s20, and back a play a childhood game (pvzgw2) got addicted one time more, and forget about Overwatch existence.

After that introduction, u only have tu know that I play like, 6 matches in entire january.

back on february with the hype Of 5 New characters and to my surprise.

I barely can play a low diamond lobby.

ofc um playing only w a friend and w a tank that I have been learning (wrecking Ball.) BUT KEEP CALM. Im not that trash, I have been playing him on Pc lobbies , watching a lot Of yeatle and chazm, UR2GMS, training techs, aim and etc. I really Don't think that is MY fault(tbh I think this Lil rat carry some matches.) . I play pretty much every tank needed with the some exception (Of Satoru Gojo) Of Dva. but tbh seeing me pulling mauga Doom or domina is a rare thing too, but whenever Its needed I pull , I know the basic, U know?

I really like (at point Of starting matches with):

Rein, Sigma, Ball, Winton and hog (sometimes ram .)

Im controller, SA, plays on a xb1fat.

I wish some tips or general advices bcz, Bro I know this BO10 Its hard but this is no Sense, m4 to d5-4 on 1 month and 10 days? nah. There some matches where my game Sense stomps, and another when I kill 2 sups and somehow my team still died like bro Just live and shoots , they have no healing😭. IDK If im being egocentric or if I expect my team to do things that are normal on masters.

I also have been struggling with teams w 2 flex sups( zeny Lúcio, Lúcio MERCY, mizuki MERCY, cat mizuki etc etc.).

some other tank has a recommendation from what to play in that cases? I personally try hog and be careful, and Ball living on healthpacks, but a pocketed enemy mauga counters thats two.

(note: im not saying that IS completely they fault, I play bad some matches obviously, but not the majority, imo Isn't Fair to me being d5-d4 locked, I could agree w a d2-d1, but almost a plat? nah I remember my plat times well and I was very worse than now.)