first shoddy battle team

alright, here's my first shoddy battle team, im completely new here and i dont seem to be having much luck really, i'd really appreciate whatever help you can give me, thanks - Athenus

i start off my team with a traditional forretress lead, to set up spikes, toxic spikes and stealth rock

Forretress (M) @nothing
Ability: sturdy
EVs: 252 Atk/252 Spd/4 SDef
timid nature
-spikes
-stealth rock
-toxic spikes
-rapid spin

it's really simple, but seems to be countered quite easily, i'd actually be quite willing to change my lead, so any suggestions would be much appreciated.
next i use Gliscor, it's really the old Britscor set

Gliscor (M) @leftovers
Ability: sand veil
EVs: 252 HP/4 Def/252 Spd
jolly nature
-taunt
-earthquake
-toxic
-roost

honestly, i find this quite hard to use, this is another one im quite willing to change.
next is an interesting choice for me, it's the traditional stalrein, except i stuck hail on it, not sure if it was such a great idea

Walrein (M) @leftovers
Ability: ice body
EVs: 220 HP/252 Def/36 Spd
-hail
-substitute
-super fang
-toxic

any suggestions on what to change it to would be appreciated.
now, another one i'm completely flexible on, im starting to realise how willing i am to change my whole team

Gyarados (M) @leftovers
Ability: intimidate
EVs: 252 Atk/4 Def/252 Spd
jolly nature
-waterfall
-stone edge
-earthquake
-thunderbolt

i really just picked this gyarados for it's movepool and decent stats
the next is a swampert i usually put in after forretress has been out and set up the spikes and stealth rock

Swampert (M) @leftovers
Ability: torrent
EVs: 240 HP/52 Def/216 Spd
-earthquake
-substitute
-waterfall
-roar

i use roar repetedly until everyone is poisoned and hurt decently, but a lot of the time this gets countered and doesnt work
finally is my blissey, and to be honest, this probably isnt the perfect set for blissey, i'd really like to keep a blissey on my team, even if i have to heavily alter it, so suggestions please?

Blissey (F) @leftovers
Ability: Natural Cure
EVs: 252 HP/252 Def/4Spd
-ice beam
-seismic toss
-softboiled
-toxic

usually i just use toxic then alternate between ice beam or seismic toss, and use softboiled when hp is low, this does usually work okay.

that's my team, any suggestions feel free to make them! thanks! - Athenus

This should be in the ou section and it needs longer descriptions.

Moved to the OU section, and locking as well.

First off, you're in violation of RMT rule #3:

Your descriptions are lacking, which means you are violating the above quoted RMT rule. If you wish to remedy this problem, explain your reasoning behind each Pokemon and why they work on your team more thoroughly. Try to aim for 3-4 sentences with your descriptions. I recommend lurking through the RMT Archive in order to see examples of what we're looking for in an RMT!

Secondly, your team is quite strange. Is there a reason why you have a Timid nature and Max Speed / Attack on Forretress? There shouldn't be since 1) Forretress isn't using any attacking moves and 2) Forretress isn't meant to be outpacing stuff. You also have no item listed. You're also missing a nature on Blissey, Walrein, and Swampert. It doesn't seem like you've tested this thoroughly so I recommend doing so. If you decide to fix these problems, private message me so I can unlock your thread.