Wifi disconnects, reconnects, some times takes really long time connec

My wifi module gets quite warm when watching youtube or similar when i put my finger on where its placed right around the front camera area.

Wifi disconnects, reconnects, some times takes really long time connect or cant connect at all. Some times i can only see the upload arrow blinking or stays on but no download arrow. No internet at that point.

Youtube crashes a lot. Videos are lagging on 720p. Even on 480p and 360p.

Screen some times flicks. Battery discharges quite fast when watching videos on youtube.

No other network issues on other devices.

Really annoying issue with this wifi sh..t

Please help.