My Setup is as following:

• TP Link ER8411 router 8 WAN/LAN and 2 SFP+ and 1 SFP ports
• TL-SG2210MP 8 POE+ and 2 SFP+ ports
• 5x Wired Deco X75 Pro
• 1x Mesh connected Deco X75 Pro
• Addidtional: OC200 Controler

The following ports are in use on the ER8411:

1. Ethernet in (later this year should be SFP+ optical fiber I recon);
2. Living room;
3. Office room;
4. Coridor (upstairs);
5. Bedroom left;
6. Bedroom right;
7. NAS DS723+;
8. TL-SG2210MP.

The Decos are devided over 2 floors (just to give an impression)

1. Main wired Deco downstairs in the office or the technical room;
2. One wired Deco in the living room;
3. One mesh Deco close to the front door for covering IOT at the front;
4. One wired Deco in the upstair corridor;
5. One wired deco in the far left bedroom;
6. One wired deco in the far right bedroom.

The 8 POE+ ports are used as following:

1. Ethernet in;
2. Camera 1;
3. Camera 2;
4. Camera 3;
5. Camera 4;
6. OC200;
7. NAS DS723+.

I thought it would be plug and play but unfortunately it's giving be a headache after months of trying to get the proper setup. Should I use the SFP ports to connect devices (router -> switch or switch -> NAS) and free up ports? Or would replacing the switch by the TPLINK TLSG2016P be a better idea?

What setup would you create with this information? I'm not tech savvy, but I can follow instructions well to get to the best setup.