Tate no Yuusha no Nariagari, Hai to Gensou no Grimgar Recommendations
Both male protagonists end up in a new world without exactly knowing how. Although nothing has stated, it does have a certain MMORPG feel to the setting. Both start with the protagonist(s) pretty much bottom rung and having to work their way up.
travel to new world
both are looked down or have self pity
both of the main MC are considered to be useless in a real battle but as the story progresses they prove others wrong