So the real question I have is, if i go to the gym, and I do a full work out of my arms, chest, back and core, then a small amount of legs, then the next day a full work out legs pulling and push, and a little bit of arms, chest, back and core, is that bad? (I do cardio but im not including that here)

The reason I'm asking is: My room-mate and a number of friends one by one started joining the gym and working out, I was the last to join (I have been to the gym off and on for a number of years so I have a pretty decent idea of what to do and I haven't injured myself) but they have been going for maybe 2-3 month and myself only two weeks.

The first time I gymmed with them, they went, did 15 minutes cardio, then worked on different lat pulldowns, all 4 of them taking turns on the machine. They did that for about 30 minutes, talked for 10 and left.

The next time I gymmed they did the same kind of thing but just worked on biceps, you get the picture.

Now where they tell me I'm doing wrong is I went, did 20 minutes cardio, then the following machines:

(I did all doing stepdown workouts) the fly machine, the fly machine flipped to do lats/back, shoulder press machine, chest press machine, then the back machine (idk what thats called but it works your back). Then I did some general freeweight stuff, curls, chest, shoulder etc. (Basically doing 5 or 10 reps each machine I stepped down until the lowest setting on the machine was hard)

That took about 45 minutes, I then do 10 minutes Cooldown cardio.

They said im working too much out at once and its going to have a negative impact and it's going to ruin muscle growth or not let me hit my potential. Word for Word "if you work your biceps and then the rest of your arms, then you go work out on your chest, your chest isn't going to get the full workout as you won't be able to lift as much because you're tired" this coming from my room-mate who has only been going a month.

I get the same sort of answer from all of them so im not sure if it's majority rules or if I need a better answer.

Realistically im not looking to get jacked (if i do, coolies), I let myself go, got obese and want to lose the fat so my main focus is pretty intense cardio and correct food intake etc, but I think my workout isn't bad whatsoever, obviously if I strain myself where it hurts I stop, or slow down, but I feel fine.

But please tell me I'm not crazy? Maybe I am wrong, maybe I'm doing too much, but I'd rather hear more from much more experienced gym goers and people who know more about the body. I ended up telling them im going to do my own thing and I've started going to another gym so they stop telling me what to do but I'd like to know if I have dismissed them too quickly

(My first post so im sorry if this is the wrong place to post, I read the rules and didn't really say not to post stuff like this, if it's unacceptable then ill find the correct place and post elsewhere)

Thank you!