Quad pain/effort on MTB compared to road bike

[briansnail]

"have a relatively cheap MTB(Trek x caliber 7 29 er) and I hate it, "

Bikes are so cheap and servicing so expensive it may be worth considering changing to a new one you can test ride.There are loads of great bikes on the CTC for sale section which have been well looked after and not sold by crooks.I was looking on the internet big discounts going post Xmas as well.